mcalc

simple interactive program to perform matrix operations. (WIP)
Index Commits Files Refs README LICENSE
commit d990fb6f5c33f920e7fc8915e7e1b4fec3182bee
parent 2686c71d37bf331e84bdaf1a134f5e8d8642f01c
Author: klewer-martin <martin.cachari@gmail.com>
Date:   Thu, 22 Apr 2021 20:07:03 -0300

Commit for test WSL & Vscode

Diffstat:

MLICENSE | 1348++++++++++++++++++++++++++++++++++++++++----------------------------------------


MMakefile | 34+++++++++++++++++-----------------


MREADME.md | 4++--


Mmain.c | 52++++++++++++++++++++++++++--------------------------


Mmain.h | 18+++++++++---------


Mmatrix.c | 438++++++++++++++++++++++++++++++++++++++++----------------------------------------


Mmatrix.h | 74+++++++++++++++++++++++++++++++++++++-------------------------------------


Mprompt.c | 114++++++++++++++++++++++++++++++++++++++++---------------------------------------


Mprompt.h | 42+++++++++++++++++++++---------------------


Mstatus.c | 2+-


Mstatus.h | 28++++++++++++++--------------


11 files changed, 1078 insertions(+), 1076 deletions(-)
diff --git a/LICENSE b/LICENSE
@@ -1,674 +1,674 @@
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-author or copyright holder as a result of your choosing to follow a
-later version.
-
-  15. Disclaimer of Warranty.
-
-  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
-APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
-HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
-OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
-THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
-PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
-IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
-ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
-
-  16. Limitation of Liability.
-
-  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
-WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
-THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
-GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
-USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
-DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
-PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
-EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
-SUCH DAMAGES.
-
-  17. Interpretation of Sections 15 and 16.
-
-  If the disclaimer of warranty and limitation of liability provided
-above cannot be given local legal effect according to their terms,
-reviewing courts shall apply local law that most closely approximates
-an absolute waiver of all civil liability in connection with the
-Program, unless a warranty or assumption of liability accompanies a
-copy of the Program in return for a fee.
-
-                     END OF TERMS AND CONDITIONS
-
-            How to Apply These Terms to Your New Programs
-
-  If you develop a new program, and you want it to be of the greatest
-possible use to the public, the best way to achieve this is to make it
-free software which everyone can redistribute and change under these terms.
-
-  To do so, attach the following notices to the program.  It is safest
-to attach them to the start of each source file to most effectively
-state the exclusion of warranty; and each file should have at least
-the "copyright" line and a pointer to where the full notice is found.
-
-    <one line to give the program's name and a brief idea of what it does.>
-    Copyright (C) <year>  <name of author>
-
-    This program is free software: you can redistribute it and/or modify
-    it under the terms of the GNU General Public License as published by
-    the Free Software Foundation, either version 3 of the License, or
-    (at your option) any later version.
-
-    This program is distributed in the hope that it will be useful,
-    but WITHOUT ANY WARRANTY; without even the implied warranty of
-    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-    GNU General Public License for more details.
-
-    You should have received a copy of the GNU General Public License
-    along with this program.  If not, see <https://www.gnu.org/licenses/>.
-
-Also add information on how to contact you by electronic and paper mail.
-
-  If the program does terminal interaction, make it output a short
-notice like this when it starts in an interactive mode:
-
-    <program>  Copyright (C) <year>  <name of author>
-    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
-    This is free software, and you are welcome to redistribute it
-    under certain conditions; type `show c' for details.
-
-The hypothetical commands `show w' and `show c' should show the appropriate
-parts of the General Public License.  Of course, your program's commands
-might be different; for a GUI interface, you would use an "about box".
-
-  You should also get your employer (if you work as a programmer) or school,
-if any, to sign a "copyright disclaimer" for the program, if necessary.
-For more information on this, and how to apply and follow the GNU GPL, see
-<https://www.gnu.org/licenses/>.
-
-  The GNU General Public License does not permit incorporating your program
-into proprietary programs.  If your program is a subroutine library, you
-may consider it more useful to permit linking proprietary applications with
-the library.  If this is what you want to do, use the GNU Lesser General
-Public License instead of this License.  But first, please read
-<https://www.gnu.org/licenses/why-not-lgpl.html>.
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
+  The GNU General Public License is a free, copyleft license for
+software and other kinds of works.
+
+  The licenses for most software and other practical works are designed
+to take away your freedom to share and change the works.  By contrast,
+the GNU General Public License is intended to guarantee your freedom to
+share and change all versions of a program--to make sure it remains free
+software for all its users.  We, the Free Software Foundation, use the
+GNU General Public License for most of our software; it applies also to
+any other work released this way by its authors.  You can apply it to
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+
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+
+  Developers that use the GNU GPL protect your rights with two steps:
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+giving you legal permission to copy, distribute and/or modify it.
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+  For the developers' and authors' protection, the GPL clearly explains
+that there is no warranty for this free software.  For both users' and
+authors' sake, the GPL requires that modified versions be marked as
+changed, so that their problems will not be attributed erroneously to
+authors of previous versions.
+
+  Some devices are designed to deny users access to install or run
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+  Finally, every program is threatened constantly by software patents.
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+  The precise terms and conditions for copying, distribution and
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+
+                       TERMS AND CONDITIONS
+
+  0. Definitions.
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+  "This License" refers to version 3 of the GNU General Public License.
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+public, and in some countries other activities as well.
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+the interface presents a list of user commands or options, such as a
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+  The "source code" for a work means the preferred form of the work
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+  All rights granted under this License are granted for the term of
+copyright on the Program, and are irrevocable provided the stated
+conditions are met.  This License explicitly affirms your unlimited
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+  You may make, run and propagate covered works that you do not
+convey, without conditions so long as your license otherwise remains
+in force.  You may convey covered works to others for the sole purpose
+of having them make modifications exclusively for you, or provide you
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+  3. Protecting Users' Legal Rights From Anti-Circumvention Law.
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+  You may convey verbatim copies of the Program's source code as you
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+  You may convey a covered work in object code form under the terms
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+  7. Additional Terms.
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+  "Additional permissions" are terms that supplement the terms of this
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+country that you have reason to believe are valid.
+
+  If, pursuant to or in connection with a single transaction or
+arrangement, you convey, or propagate by procuring conveyance of, a
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+you grant is automatically extended to all recipients of the covered
+work and works based on it.
+
+  A patent license is "discriminatory" if it does not include within
+the scope of its coverage, prohibits the exercise of, or is
+conditioned on the non-exercise of one or more of the rights that are
+specifically granted under this License.  You may not convey a covered
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+conveyed by you (or copies made from those copies), or (b) primarily
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+contain the covered work, unless you entered into that arrangement,
+or that patent license was granted, prior to 28 March 2007.
+
+  Nothing in this License shall be construed as excluding or limiting
+any implied license or other defenses to infringement that may
+otherwise be available to you under applicable patent law.
+
+  12. No Surrender of Others' Freedom.
+
+  If conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License.  If you cannot convey a
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+License and any other pertinent obligations, then as a consequence you may
+not convey it at all.  For example, if you agree to terms that obligate you
+to collect a royalty for further conveying from those to whom you convey
+the Program, the only way you could satisfy both those terms and this
+License would be to refrain entirely from conveying the Program.
+
+  13. Use with the GNU Affero General Public License.
+
+  Notwithstanding any other provision of this License, you have
+permission to link or combine any covered work with a work licensed
+under version 3 of the GNU Affero General Public License into a single
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+License will continue to apply to the part which is the covered work,
+but the special requirements of the GNU Affero General Public License,
+section 13, concerning interaction through a network will apply to the
+combination as such.
+
+  14. Revised Versions of this License.
+
+  The Free Software Foundation may publish revised and/or new versions of
+the GNU General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+  Each version is given a distinguishing version number.  If the
+Program specifies that a certain numbered version of the GNU General
+Public License "or any later version" applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation.  If the Program does not specify a version number of the
+GNU General Public License, you may choose any version ever published
+by the Free Software Foundation.
+
+  If the Program specifies that a proxy can decide which future
+versions of the GNU General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+  Later license versions may give you additional or different
+permissions.  However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
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+
+  17. Interpretation of Sections 15 and 16.
+
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+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<https://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<https://www.gnu.org/licenses/why-not-lgpl.html>.
diff --git a/Makefile b/Makefile
@@ -1,17 +1,17 @@
-CC = gcc
-FLAGS = -Wall -pedantic
-
-all: clean prompt.o matrix.o main.o
-    $(CC) $(FLAGS) main.o matrix.o prompt.o
-
-matrix.o: status.h matrix.h
-    $(CC) $(FLAGS) -c matrix.c
-
-prompt.o:
-    $(CC) $(FLAGS) -c prompt.c
-
-main.o:
-    $(CC) $(FLAGS) -c main.c
-
-clean:
-    rm -rf *.o
+CC = gcc
+FLAGS = -Wall -pedantic
+
+all: clean prompt.o matrix.o main.o
+    $(CC) $(FLAGS) main.o matrix.o prompt.o
+
+matrix.o: status.h matrix.h
+    $(CC) $(FLAGS) -c matrix.c
+
+prompt.o:
+    $(CC) $(FLAGS) -c prompt.c
+
+main.o:
+    $(CC) $(FLAGS) -c main.c
+
+clean:
+    rm -rf *.o
diff --git a/README.md b/README.md
@@ -1,2 +1,2 @@
-# matrix-calculator-cli
-Simple non interactive program (for now) that can perform matrix operations 
+# matrix-calculator-cli
+Simple non interactive program (for now) that can perform matrix operations 
diff --git a/main.c b/main.c
@@ -1,26 +1,26 @@
-#include "main.h"
-#include "matrix.h"
-#include "prompt.h"
-
-int main (void)
-{
-    /*
-    matrix_t matrix;
-    m_load_dim(&matrix);
-
-    m_create(matrix.rows, matrix.columns, &matrix);
-
-    m_initrand(&matrix);
-    m_print(&matrix);
-    putchar('\n');
-
-    m_destroy(&matrix);
-    */
-    status_t st;
-
-    prompt_welcome();
-    if((st = main_prompt()) != OK)
-        return st;
-
-    return 0;
-}
+#include "main.h"
+#include "matrix.h"
+#include "prompt.h"
+
+int main (void)
+{
+    /*
+    matrix_t matrix;
+    m_load_dim(&matrix);
+
+    m_create(matrix.rows, matrix.columns, &matrix);
+
+    m_initrand(&matrix);
+    m_print(&matrix);
+    putchar('\n');
+
+    m_destroy(&matrix);
+    */
+    status_t st;
+
+    prompt_welcome();
+    if((st = main_prompt()) != OK)
+        return st;
+
+    return 0;
+}
diff --git a/main.h b/main.h
@@ -1,9 +1,9 @@
-#ifndef _MAIN_H
-#define _MAIN_H
-
-#define N 10
-#define M 10
-
-#include <stdio.h>
-
-#endif
+#ifndef _MAIN_H
+#define _MAIN_H
+
+#define N 10
+#define M 10
+
+#include <stdio.h>
+
+#endif
diff --git a/matrix.c b/matrix.c
@@ -1,219 +1,219 @@
-#include "matrix.h"
-
-status_t m_print(matrix_t *matrix)
-{
-    if(matrix == NULL) return ERROR_NULL_POINTER;
-
-    for(size_t i = 0; i < matrix->rows; i++) {
-        putchar('(');
-        putchar(' ');
-        for(size_t j = 0; j < matrix->columns; j++) {
-            printf("%10f ", matrix->array[i][j]);
-        }
-        putchar(')');
-        putchar('\n');
-    }
-    return OK;
-}
-
-status_t m_initrand(matrix_t *matrix)
-{
-    if(matrix == NULL) return ERROR_NULL_POINTER;
-
-    srand((unsigned int)time(NULL));
-    for(size_t i = 0; i < matrix->rows; i++) {
-        for(size_t j = 0; j < matrix->columns; j++) {
-            matrix->array[i][j] = ((double)rand()/(double)(RAND_MAX)) * 20;
-        }
-    }
-    return OK;
-}
-
-status_t m_load(matrix_t *matrix)
-{
-    if(matrix == NULL) return ERROR_NULL_POINTER;
-
-    printf("%s", "Matrix of dimension N x M:\n\
-            ( 00 01 .. 0N )\n\
-            ( 10 01 .. 1N )\n\
-            ( .. .. .. .. )\n\
-            ( M0 M1 .. MN )\n");
-    char buf[MAX_IN_LEN];
-    int aux;
-    for(size_t i = 0; i < matrix->rows; i++) {
-        for(size_t j = 0; j < matrix->columns; j++) {
-            empty_string(buf, MAX_IN_LEN);
-            printf("Enter value %ld%ld of the matrix.\n", i, j);
-            for(size_t k = 0; ((aux = getchar()) != '\n') && k < MAX_IN_LEN; k++)
-                if(isdigit(aux) || (aux == '.') || (aux == '-'))
-                    buf[k] = aux;
-            
-            matrix->array[i][j] = strtod(buf, NULL);
-        }
-    }
-    return OK;
-}
-
-status_t m_load_dim(matrix_t *matrix)
-{
-    if(matrix == NULL) return ERROR_NULL_POINTER;
-
-    char *buffer;
-    buffer = (char *)malloc(DIM_BUFFER_MAX_SIZE * sizeof(char));
-    if(buffer == NULL) return ERROR_ALLOCATING_MEMORY;
-
-    empty_string(buffer, DIM_BUFFER_MAX_SIZE);
-
-    printf("%s", "Enter no. of rows: \n");
-    fgets(buffer, DIM_BUFFER_MAX_SIZE, stdin);
-    matrix->rows = strtol(buffer, NULL, 10);
-
-    empty_string(buffer, DIM_BUFFER_MAX_SIZE);
-
-    printf("%s", "Enter no. of columns: \n");
-    fgets(buffer, DIM_BUFFER_MAX_SIZE, stdin);
-    matrix->columns = strtol(buffer, NULL, 10);
-
-    free(buffer);
-    return OK;
-}
-
-status_t m_transpose(matrix_t *matrix, matrix_t *matrix_transpose)
-{
-    if((matrix == NULL) || (matrix_transpose == NULL))
-        return ERROR_NULL_POINTER;
-
-    for(size_t i = 0; i < matrix->rows; i++) {
-        for(size_t j = 0; j < matrix->columns; j++)
-            matrix_transpose->array[j][i] = matrix->array[i][j];
-
-    }
-    return OK;
-}
-
-status_t m_add(matrix_t *matrixA, matrix_t *matrixB, matrix_t *result)
-{
-    if((matrixA == NULL) || (matrixB == NULL) || (result == NULL))
-        return ERROR_NULL_POINTER;
-    /*    This operation can be only performed if both matrix are squared and has the same dimension*/
-    if((matrixA->rows != matrixB->rows) || (matrixA->columns != matrixB->columns))
-        return ERROR_MATRIX_DIMENSION;
-
-    for(size_t i = 0; i < result->rows; i++) {
-        for(size_t j = 0; j < result->columns; j++) {
-            result->array[i][j] = matrixA->array[i][j] + matrixB->array[i][j];
-
-        }    
-    }
-    return OK;
-}
-
-status_t m_substract(matrix_t *matrixA, matrix_t *matrixB, matrix_t *result)
-{
-    if((matrixA == NULL) || (matrixB == NULL) || (result == NULL))
-        return ERROR_NULL_POINTER;
-    /*    This operation can be only performed if both matrix are squared and has the same dimension*/
-    else if((matrixA->rows != matrixB->rows) || (matrixA->columns != matrixB->columns))
-        return ERROR_MATRIX_DIMENSION;
-
-    for(size_t i = 0; i < result->rows; i++) {
-        for(size_t j = 0; j < result->columns; j++) {
-            result->array[i][j] = matrixA->array[i][j] - matrixB->array[i][j];
-
-        }    
-    }
-    return OK;
-}
-
-status_t m_multiply(matrix_t *matrixA, matrix_t *matrixB, matrix_t *result)
-{
-    if((matrixA == NULL) || (matrixB == NULL) || (result == NULL))
-        return ERROR_NULL_POINTER;
-    else if(matrixA->columns != matrixB->rows)
-        return ERROR_MATRIX_DIMENSION;
-
-    double aux;
-    for(size_t i = 0; i < matrixA->rows; i++) {
-        for(size_t j = 0; j < matrixB->columns; j++) {
-            for(size_t k = aux = 0; k < matrixA->columns; k++)
-                aux += ((matrixA->array[i][k])*(matrixB->array[k][j]));
-            
-            result->array[i][j] = aux;
-        }    
-    }
-    return OK;
-}
-
-status_t m_divide(matrix_t *matrixA, matrix_t *matrixB, matrix_t *result)
-{
-    if((matrixA == NULL) || (matrixB == NULL) || (result == NULL))
-        return ERROR_NULL_POINTER;
-    else if(matrixA->columns != matrixB->rows)
-        return ERROR_MATRIX_DIMENSION;
-
-    double aux;
-    for(size_t i = 0; i < matrixA->rows; i++) {
-        for(size_t j = 0; j < matrixB->columns; j++) {
-            for(size_t k = aux = 0; k < matrixA->columns; k++)
-                aux += ((matrixA->array[i][k]) / (matrixB->array[k][j]));
-            
-            result->array[i][j] = aux;
-        }    
-    }
-    return OK;
-}
-
-status_t m_create(size_t rows, size_t columns, matrix_t *matrix)
-{
-    if(matrix == NULL) return ERROR_NULL_POINTER;
-
-    matrix->rows = rows;
-    matrix->columns = columns;
-
-    matrix->array = (double **)malloc((rows) * sizeof(double));
-
-    for (size_t i = 0; i < rows; i++)
-         matrix->array[i] = (double *)malloc(columns * sizeof(double));
-
-    return OK;
-}
-
-status_t m_destroy(matrix_t *matrix)
-{
-    if(matrix == NULL) return ERROR_NULL_POINTER;
-
-    for (size_t i = 0; i < matrix->rows; i++)
-         free(matrix->array[i]);
-
-    free(matrix->array);
-    return OK;
-}
-
-bool m_isSimetric(matrix_t *matrix)
-{
-    matrix_t matrix_transpose;
-    m_create(matrix->columns, matrix->rows, &matrix_transpose);
-    m_transpose(matrix, &matrix_transpose);
-
-    size_t aux = 0;
-    for(size_t i = 0; i < matrix->rows; i++)
-        for(size_t j = 0; j < matrix->columns; j++)
-            if(matrix->array[i][j] == matrix_transpose.array[i][j])
-                aux++;
-
-    //if(aux == (r * c))
-    //    return true;
-
-    //return false;
-    return true * (aux == (matrix->rows * matrix->columns)) + false * (aux != (matrix->rows * matrix->columns));
-}
-
-status_t empty_string(char *string, size_t len)
-{
-    if(string == NULL) return ERROR_NULL_POINTER;
-
-    for(size_t i = 0; i < len; i++)
-        string[i] = '\0';
-
-    return OK;
-}
+#include "matrix.h"
+
+status_t m_print(matrix_t *matrix)
+{
+    if(matrix == NULL) return ERROR_NULL_POINTER;
+
+    for(size_t i = 0; i < matrix->rows; i++) {
+        putchar('(');
+        putchar(' ');
+        for(size_t j = 0; j < matrix->columns; j++) {
+            printf("%10f ", matrix->array[i][j]);
+        }
+        putchar(')');
+        putchar('\n');
+    }
+    return OK;
+}
+
+status_t m_initrand(matrix_t *matrix)
+{
+    if(matrix == NULL) return ERROR_NULL_POINTER;
+
+    srand((unsigned int)time(NULL));
+    for(size_t i = 0; i < matrix->rows; i++) {
+        for(size_t j = 0; j < matrix->columns; j++) {
+            matrix->array[i][j] = ((double)rand()/(double)(RAND_MAX)) * 20;
+        }
+    }
+    return OK;
+}
+
+status_t m_load(matrix_t *matrix)
+{
+    if(matrix == NULL) return ERROR_NULL_POINTER;
+
+    printf("%s", "Matrix of dimension N x M:\n\
+            ( 00 01 .. 0N )\n\
+            ( 10 01 .. 1N )\n\
+            ( .. .. .. .. )\n\
+            ( M0 M1 .. MN )\n");
+    char buf[MAX_IN_LEN];
+    int aux;
+    for(size_t i = 0; i < matrix->rows; i++) {
+        for(size_t j = 0; j < matrix->columns; j++) {
+            empty_string(buf, MAX_IN_LEN);
+            printf("Enter value %ld%ld of the matrix.\n", i, j);
+            for(size_t k = 0; ((aux = getchar()) != '\n') && k < MAX_IN_LEN; k++)
+                if(isdigit(aux) || (aux == '.') || (aux == '-'))
+                    buf[k] = aux;
+            
+            matrix->array[i][j] = strtod(buf, NULL);
+        }
+    }
+    return OK;
+}
+
+status_t m_load_dim(matrix_t *matrix)
+{
+    if(matrix == NULL) return ERROR_NULL_POINTER;
+
+    char *buffer;
+    buffer = (char *)malloc(DIM_BUFFER_MAX_SIZE * sizeof(char));
+    if(buffer == NULL) return ERROR_ALLOCATING_MEMORY;
+
+    empty_string(buffer, DIM_BUFFER_MAX_SIZE);
+
+    printf("%s", "Enter no. of rows: \n");
+    fgets(buffer, DIM_BUFFER_MAX_SIZE, stdin);
+    matrix->rows = strtol(buffer, NULL, 10);
+
+    empty_string(buffer, DIM_BUFFER_MAX_SIZE);
+
+    printf("%s", "Enter no. of columns: \n");
+    fgets(buffer, DIM_BUFFER_MAX_SIZE, stdin);
+    matrix->columns = strtol(buffer, NULL, 10);
+
+    free(buffer);
+    return OK;
+}
+
+status_t m_transpose(matrix_t *matrix, matrix_t *matrix_transpose)
+{
+    if((matrix == NULL) || (matrix_transpose == NULL))
+        return ERROR_NULL_POINTER;
+
+    for(size_t i = 0; i < matrix->rows; i++) {
+        for(size_t j = 0; j < matrix->columns; j++)
+            matrix_transpose->array[j][i] = matrix->array[i][j];
+
+    }
+    return OK;
+}
+
+status_t m_add(matrix_t *matrixA, matrix_t *matrixB, matrix_t *result)
+{
+    if((matrixA == NULL) || (matrixB == NULL) || (result == NULL))
+        return ERROR_NULL_POINTER;
+    /*    This operation can be only performed if both matrix are squared and has the same dimension*/
+    if((matrixA->rows != matrixB->rows) || (matrixA->columns != matrixB->columns))
+        return ERROR_MATRIX_DIMENSION;
+
+    for(size_t i = 0; i < result->rows; i++) {
+        for(size_t j = 0; j < result->columns; j++) {
+            result->array[i][j] = matrixA->array[i][j] + matrixB->array[i][j];
+
+        }    
+    }
+    return OK;
+}
+
+status_t m_substract(matrix_t *matrixA, matrix_t *matrixB, matrix_t *result)
+{
+    if((matrixA == NULL) || (matrixB == NULL) || (result == NULL))
+        return ERROR_NULL_POINTER;
+    /*    This operation can be only performed if both matrix are squared and has the same dimension*/
+    else if((matrixA->rows != matrixB->rows) || (matrixA->columns != matrixB->columns))
+        return ERROR_MATRIX_DIMENSION;
+
+    for(size_t i = 0; i < result->rows; i++) {
+        for(size_t j = 0; j < result->columns; j++) {
+            result->array[i][j] = matrixA->array[i][j] - matrixB->array[i][j];
+
+        }    
+    }
+    return OK;
+}
+
+status_t m_multiply(matrix_t *matrixA, matrix_t *matrixB, matrix_t *result)
+{
+    if((matrixA == NULL) || (matrixB == NULL) || (result == NULL))
+        return ERROR_NULL_POINTER;
+    else if(matrixA->columns != matrixB->rows)
+        return ERROR_MATRIX_DIMENSION;
+
+    double aux;
+    for(size_t i = 0; i < matrixA->rows; i++) {
+        for(size_t j = 0; j < matrixB->columns; j++) {
+            for(size_t k = aux = 0; k < matrixA->columns; k++)
+                aux += ((matrixA->array[i][k])*(matrixB->array[k][j]));
+            
+            result->array[i][j] = aux;
+        }    
+    }
+    return OK;
+}
+
+status_t m_divide(matrix_t *matrixA, matrix_t *matrixB, matrix_t *result)
+{
+    if((matrixA == NULL) || (matrixB == NULL) || (result == NULL))
+        return ERROR_NULL_POINTER;
+    else if(matrixA->columns != matrixB->rows)
+        return ERROR_MATRIX_DIMENSION;
+
+    double aux;
+    for(size_t i = 0; i < matrixA->rows; i++) {
+        for(size_t j = 0; j < matrixB->columns; j++) {
+            for(size_t k = aux = 0; k < matrixA->columns; k++)
+                aux += ((matrixA->array[i][k]) / (matrixB->array[k][j]));
+            
+            result->array[i][j] = aux;
+        }    
+    }
+    return OK;
+}
+
+status_t m_create(size_t rows, size_t columns, matrix_t *matrix)
+{
+    if(matrix == NULL) return ERROR_NULL_POINTER;
+
+    matrix->rows = rows;
+    matrix->columns = columns;
+
+    matrix->array = (double **)malloc((rows) * sizeof(double));
+
+    for (size_t i = 0; i < rows; i++)
+         matrix->array[i] = (double *)malloc(columns * sizeof(double));
+
+    return OK;
+}
+
+status_t m_destroy(matrix_t *matrix)
+{
+    if(matrix == NULL) return ERROR_NULL_POINTER;
+
+    for (size_t i = 0; i < matrix->rows; i++)
+         free(matrix->array[i]);
+
+    free(matrix->array);
+    return OK;
+}
+
+bool m_isSimetric(matrix_t *matrix)
+{
+    matrix_t matrix_transpose;
+    m_create(matrix->columns, matrix->rows, &matrix_transpose);
+    m_transpose(matrix, &matrix_transpose);
+
+    size_t aux = 0;
+    for(size_t i = 0; i < matrix->rows; i++)
+        for(size_t j = 0; j < matrix->columns; j++)
+            if(matrix->array[i][j] == matrix_transpose.array[i][j])
+                aux++;
+
+    //if(aux == (r * c))
+    //    return true;
+
+    //return false;
+    return true * (aux == (matrix->rows * matrix->columns)) + false * (aux != (matrix->rows * matrix->columns));
+}
+
+status_t empty_string(char *string, size_t len)
+{
+    if(string == NULL) return ERROR_NULL_POINTER;
+
+    for(size_t i = 0; i < len; i++)
+        string[i] = '\0';
+
+    return OK;
+}
diff --git a/matrix.h b/matrix.h
@@ -1,37 +1,37 @@
-#ifndef _MATRIX_STRUCT_H
-#define _MATRIX_STRUCT_H
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <stdbool.h>
-#include <time.h>
-#include <ctype.h>
-
-#include "status.h"
-
-#define MAX_IN_LEN 6
-#define DIM_BUFFER_MAX_SIZE 6
-
-typedef struct {
-    size_t rows, columns;
-    double **array;
-} matrix_t;
-
-status_t m_print(matrix_t *matrix);
-status_t m_initrand(matrix_t *matrix);
-status_t m_load(matrix_t *matrix);
-status_t m_load_dim(matrix_t *matrix);
-status_t m_transpose(matrix_t *matrix, matrix_t *matrix_transpose);
-status_t m_add(matrix_t *matrixA, matrix_t *matrixB, matrix_t *result);
-status_t m_substract(matrix_t *matrixA, matrix_t *matrixB, matrix_t *result);
-status_t m_multiply(matrix_t *matrixA, matrix_t *matrixB, matrix_t *result);
-status_t m_divide(matrix_t *matrixA, matrix_t *matrixB, matrix_t *result);
-status_t m_create(size_t rows, size_t columns, matrix_t *matrix);
-status_t m_destroy(matrix_t *matrix);
-
-
-status_t empty_string(char *string, size_t len);
-
-bool m_isSimetric(matrix_t *matrix);
-
-#endif
+#ifndef _MATRIX_STRUCT_H
+#define _MATRIX_STRUCT_H
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <time.h>
+#include <ctype.h>
+
+#include "status.h"
+
+#define MAX_IN_LEN 6
+#define DIM_BUFFER_MAX_SIZE 6
+
+typedef struct {
+    size_t rows, columns;
+    double **array;
+} matrix_t;
+
+status_t m_print(matrix_t *matrix);
+status_t m_initrand(matrix_t *matrix);
+status_t m_load(matrix_t *matrix);
+status_t m_load_dim(matrix_t *matrix);
+status_t m_transpose(matrix_t *matrix, matrix_t *matrix_transpose);
+status_t m_add(matrix_t *matrixA, matrix_t *matrixB, matrix_t *result);
+status_t m_substract(matrix_t *matrixA, matrix_t *matrixB, matrix_t *result);
+status_t m_multiply(matrix_t *matrixA, matrix_t *matrixB, matrix_t *result);
+status_t m_divide(matrix_t *matrixA, matrix_t *matrixB, matrix_t *result);
+status_t m_create(size_t rows, size_t columns, matrix_t *matrix);
+status_t m_destroy(matrix_t *matrix);
+
+
+status_t empty_string(char *string, size_t len);
+
+bool m_isSimetric(matrix_t *matrix);
+
+#endif
diff --git a/prompt.c b/prompt.c
@@ -1,56 +1,58 @@
-#include "prompt.h"
-
-void prompt_welcome(void)
-{
-    printf("Welcome to matrix-calculator!\n");
-    printf("What do you want to do?\n");
-    printf("1.- Load a matrix's values of dimensions N x M by hand.\n");
-    printf("2.- Load a matrix's values with a .txt file.\n");
-    printf("3.- Create a random matrix of dimensions N x M.\n");
-}
-
-status_t user_input(user_input_t option)
-{
-    switch (option) {
-        case MAIN_PROMPT:
-            main_prompt();
-            break;
-        
-        default: return ERROR_NO_USER_INPUT;
-    }
-    return OK;
-}
-
-status_t main_prompt(void)
-{
-    char *buffer;
-    size_t i;
-
-    buffer = (char *)malloc(DIM_BUFFER_MAX_SIZE * sizeof(char));
-    if(buffer == NULL) return ERROR_ALLOCATING_MEMORY;
-
-    empty_string(buffer, DIM_BUFFER_MAX_SIZE);
-
-    fgets(buffer, DIM_BUFFER_MAX_SIZE, stdin);
-    i = strtol(buffer, NULL, 10);
-    if((i < 1) || (i > MAX_MAIN_PROMPT_CMD))
-        return ERROR_MAX_MAIN_PROMPT_REACHED;
-
-    putchar('\n');
-    switch(i) {
-        case 1:
-            {
-                matrix_t matrix;
-                m_load_dim(&matrix);
-
-                m_create(matrix.rows, matrix.columns, &matrix);
-
-                putchar('\n');
-                m_load(&matrix);
-                printf("%s", "The matrix you entered is:\n");
-                m_print(&matrix);
-                m_destroy(&matrix);
-        }
-    }
-    return OK;
-}
+#include "prompt.h"
+
+void prompt_welcome(void)
+{
+    printf("Welcome to matrix-calculator!\n");
+    printf("What do you want to do?\n");
+    printf("1.- Load a matrix's values of dimensions N x M by hand.\n");
+    printf("2.- Load a matrix's values with a .txt file.\n");
+    printf("3.- Create a random matrix of dimensions N x M.\n");
+}
+
+status_t user_input(user_input_t option)
+{
+    switch (option) {
+        case MAIN_PROMPT:
+            main_prompt();
+            break;
+        
+        default: return ERROR_NO_USER_INPUT;
+    }
+    return OK;
+}
+
+status_t main_prompt(void)
+{
+    char *buffer;
+    size_t i;
+
+    buffer = (char *)malloc(DIM_BUFFER_MAX_SIZE * sizeof(char));
+    if(buffer == NULL) return ERROR_ALLOCATING_MEMORY;
+
+    empty_string(buffer, DIM_BUFFER_MAX_SIZE);
+
+    fgets(buffer, DIM_BUFFER_MAX_SIZE, stdin);
+    i = strtol(buffer, NULL, 10);
+    if((i < 1) || (i > MAX_MAIN_PROMPT_CMD))
+        return ERROR_MAX_MAIN_PROMPT_REACHED;
+
+    putchar('\n');
+    switch(i) {
+        case 1:
+            {
+                matrix_t matrix;
+                m_load_dim(&matrix);
+
+                m_create(matrix.rows, matrix.columns, &matrix);
+
+                putchar('\n');
+                m_load(&matrix);
+                printf("%s", "The matrix you entered is:\n");
+                m_print(&matrix);
+                m_destroy(&matrix);
+        }
+    }
+
+    free(buffer);
+    return OK;
+}
diff --git a/prompt.h b/prompt.h
@@ -1,21 +1,21 @@
-#ifndef _PROMPT_H
-#define _PROMPT_H
-
-#include "matrix.h"
-#include "status.h"
-
-#include <unistd.h>
-
-#define MAX_MAIN_PROMPT_CMD 3
-#define SIZE_OF_BUFFER 10
-
-typedef enum {
-    MAIN_PROMPT
-} user_input_t;
-
-void prompt_welcome(void);
-status_t user_input(user_input_t option);
-status_t main_prompt(void);
-status_t load_m_hand(matrix_t *matrix);
-
-#endif
+#ifndef _PROMPT_H
+#define _PROMPT_H
+
+#include "matrix.h"
+#include "status.h"
+
+#include <unistd.h>
+
+#define MAX_MAIN_PROMPT_CMD 3
+#define SIZE_OF_BUFFER 10
+
+typedef enum {
+    MAIN_PROMPT
+} user_input_t;
+
+void prompt_welcome(void);
+status_t user_input(user_input_t option);
+status_t main_prompt(void);
+status_t load_m_hand(matrix_t *matrix);
+
+#endif
diff --git a/status.c b/status.c
@@ -1 +1 @@
-#include "status.h"
+#include "status.h"
diff --git a/status.h b/status.h
@@ -1,14 +1,14 @@
-#ifndef _STATUS_H
-#define _STATUS_H
-
-typedef enum {
-    OK,
-    ERROR_MATRIX_DIMENSION,
-    ERROR_NO_USER_INPUT,
-    ERROR_MAX_CMD_PROMPT,
-    ERROR_ALLOCATING_MEMORY,
-    ERROR_MAX_MAIN_PROMPT_REACHED,
-    ERROR_NULL_POINTER
-} status_t;
-
-#endif
+#ifndef _STATUS_H
+#define _STATUS_H
+
+typedef enum {
+    OK,
+    ERROR_MATRIX_DIMENSION,
+    ERROR_NO_USER_INPUT,
+    ERROR_MAX_CMD_PROMPT,
+    ERROR_ALLOCATING_MEMORY,
+    ERROR_MAX_MAIN_PROMPT_REACHED,
+    ERROR_NULL_POINTER
+} status_t;
+
+#endif