1 #include <stdio.h> 2 #include <stdlib.h> 3 #include <stdbool.h> 4 #include <time.h> 5 6 #define N 3 7 #define M 3 8 9 void m_load(size_t r, size_t c, double matrix[r][c]); 10 void m_initrand(size_t r, size_t c, double matrix[r][c]); 11 void m_print(size_t r, size_t c, double matrix[r][c]); 12 void m_transpose(size_t r, size_t c, double matrix[r][c], double matrix_t[c][r]); 13 14 bool m_isSimetric(size_t r, size_t c, double matrix[r][c]); 15 16 17 int main (void) 18 { 19 double matrix[N][M]; 20 double matrix_transpose[M][N]; 21 22 m_load(N, M, matrix); 23 m_print(N, M, matrix); 24 putchar('\n'); 25 26 m_transpose(N, M, matrix, matrix_transpose); 27 m_print(M, N, matrix_transpose); 28 29 printf("\nThe matrix is %s SIMETRIC.", m_isSimetric(N, M, matrix) ? "" : "NOT"); 30 31 return 0; 32 } 33 34 void m_load(size_t r, size_t c, double matrix[r][c]) 35 { 36 char buf[20]; 37 for(size_t i = 0; i < r; i++) { 38 for(size_t j = 0; j < c; j++) { 39 fgets(buf, 20, stdin); 40 matrix[i][j] = strtod(buf, NULL); /* value from stdin */ 41 } 42 } 43 } 44 45 void m_initrand(size_t r, size_t c, double matrix[r][c]) 46 { 47 srand((unsigned int)time(NULL)); 48 49 for(size_t i = 0; i < N; i++) { 50 for(size_t j = 0; j < M; j++) { 51 matrix[i][j] = ((double)rand()/(double)(RAND_MAX)) * 20; 52 } 53 } 54 } 55 56 void m_print(size_t r, size_t c, double matrix[r][c]) 57 { 58 for(size_t i = 0; i < r; i++) { 59 putchar('('); 60 putchar(' '); 61 for(size_t j = 0; j < c; j++) { 62 printf("%6.2f ", matrix[i][j]); 63 } 64 putchar(')'); 65 putchar('\n'); 66 } 67 } 68 69 void m_transpose(size_t r, size_t c, double matrix[r][c], double matrix_t[c][r]) 70 { 71 for(size_t i = 0; i < r; i++) { 72 for(size_t j = 0; j < c; j++) 73 matrix_t[j][i] = matrix[i][j]; 74 75 } 76 } 77 78 bool m_isSimetric(size_t r, size_t c, double matrix[r][c]) 79 { 80 double matrix_transpose[r][c]; 81 m_transpose(r, c, matrix, matrix_transpose); 82 83 size_t aux = 0; 84 for(size_t i = 0; i < r; i++) 85 for(size_t j = 0; j < c; j++) 86 if(matrix[i][j] == matrix_transpose[i][j]) 87 aux++; 88 89 //if(aux == (r * c)) 90 // return true; 91 92 //return false; 93 return true * (aux == (r * c)) + false * (aux != (r * c)); 94 }
