To compile:
make matricesmatrices.c:
#include <stdio.h> #include <stdlib.h> #include <time.h> int main() { int m1[5][5], m2[5][5], res[5][5]; // Use current time as seed for random generator srand(time(NULL)); //init result to 0 for (int i = 0; i < 5; ++i) { for (int j = 0; j < 5; ++j) res[i][j] = 0; } // fill matrix with random numbers for (int i = 0; i < 5; ++i) { for (int j = 0; j < 5; ++j) m1[i][j] = rand() % 5; } for (int i = 0; i < 5; ++i) { for (int j = 0; j < 5; ++j) m2[i][j] = rand() % 5; } //multiply matrices for (int i = 0; i < 5; ++i) { for (int j = 0; j < 5; ++j) { for (int k = 0; k < 5; ++k) { res[i][j] += m1[i][k] * m2[k][j]; } } } printf("m1:\n"); for (int i = 0; i < 5; ++i) { for (int j = 0; j < 5; ++j) { printf("%d ", m1[i][j]); if (j == 4) printf("\n"); } } printf("m2:\n"); for (int i = 0; i < 5; ++i) { for (int j = 0; j < 5; ++j) { printf("%d ", m2[i][j]); if (j == 4) printf("\n"); } } printf("Result:\n"); for (int i = 0; i < 5; ++i) { for (int j = 0; j < 5; ++j) { printf("%d ", res[i][j]); if (j == 4) printf("\n"); } } return EXIT_SUCCESS; }
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