commit f5649e35337702c283fa276c6c03316870f76c98
parent fd30e4db95b63e0e176e9f6e70291b1ad8fcfa44
Author: klewer-martin <martin.cachari@gmail.com>
Date: Thu, 1 Apr 2021 19:38:21 -0300
Update: added ex48.c which contains a func. to multiply to matrix's
Diffstat:
| A | guia03/ex48.c | | | 94 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
1 file changed, 94 insertions(+), 0 deletions(-)
diff --git a/guia03/ex48.c b/guia03/ex48.c
@@ -0,0 +1,94 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <time.h>
+
+#define N 3
+#define M 3
+
+void m_load(size_t r, size_t c, double matrix[r][c]);
+void m_print(size_t r, size_t c, double matrix[r][c]);
+void m_initrand(size_t r, size_t c, double matrix[r][c]);
+void m_transpose(size_t r, size_t c, double matrix[r][c], double matrix_t[c][r]);
+
+bool m_isSimetric(size_t r, size_t c, double matrix[r][c]);
+
+
+int main (void)
+{
+ double matrix[N][M];
+ double matrix_transpose[M][N];
+
+ m_load(N, M, matrix);
+ m_print(N, M, matrix);
+ putchar('\n');
+
+ m_transpose(N, M, matrix, matrix_transpose);
+ m_print(M, N, matrix_transpose);
+
+ printf("\nThe matrix is %s SIMETRIC.", m_isSimetric(N, M, matrix) ? "" : "NOT");
+
+ return 0;
+}
+
+void m_load(size_t r, size_t c, double matrix[r][c])
+{
+ char buf[20];
+ for(size_t i = 0; i < r; i++) {
+ for(size_t j = 0; j < c; j++) {
+ fgets(buf, 20, stdin);
+ matrix[i][j] = strtod(buf, NULL); /* value from stdin */
+ }
+ }
+}
+
+void m_initrand(size_t r, size_t c, double matrix[r][c])
+{
+ srand((unsigned int)time(NULL));
+
+ for(size_t i = 0; i < N; i++) {
+ for(size_t j = 0; j < M; j++) {
+ matrix[i][j] = ((double)rand()/(double)(RAND_MAX)) * 20;
+ }
+ }
+}
+
+void m_print(size_t r, size_t c, double matrix[r][c])
+{
+ for(size_t i = 0; i < r; i++) {
+ putchar('(');
+ putchar(' ');
+ for(size_t j = 0; j < c; j++) {
+ printf("%6.2f ", matrix[i][j]);
+ }
+ putchar(')');
+ putchar('\n');
+ }
+}
+
+void m_transpose(size_t r, size_t c, double matrix[r][c], double matrix_t[c][r])
+{
+ for(size_t i = 0; i < r; i++) {
+ for(size_t j = 0; j < c; j++)
+ matrix_t[j][i] = matrix[i][j];
+
+ }
+}
+
+bool m_isSimetric(size_t r, size_t c, double matrix[r][c])
+{
+ double matrix_transpose[r][c];
+ m_transpose(r, c, matrix, matrix_transpose);
+
+ size_t aux = 0;
+ for(size_t i = 0; i < r; i++)
+ for(size_t j = 0; j < c; j++)
+ if(matrix[i][j] == matrix_transpose[i][j])
+ aux++;
+
+ //if(aux == (r * c))
+ // return true;
+
+ //return false;
+ return true * (aux == (r * c)) + false * (aux != (r * c));
+}
