1、
#include <stdio.h> int main(void) { int a[4][3] = {{2,5,4},{1,2,4},{5,3,2},{4,2,6}}; int b[3][4] = {{2,1,6,2},{3,2,4,1},{5,2,1,2}}; int i, j, k; int c[4][4] = {0}; for (i = 0; i < 4; i++) { for (k = 0; k < 4; k++) { for (j = 0; j < 3; j++) { c[i][k] += a[i][j] * b[j][k]; } } } for (i = 0; i < 4; i++) { for (j = 0; j < 4; j++) { printf("%d ", c[i][j]); } putchar('\n'); } return 0; }
↓
#include <stdio.h>
int main(void) { int a[4][3], b[3][4]; int i, j; puts("please input the elements of 4 * 3 matrix."); for (i = 0; i < 4; i++) { for (j = 0; j < 3; j++) { printf("a[%d][%d] = ", i, j); scanf("%d", &a[i][j]); } } puts("please input the elements of 3 * 4 matrix."); for (i = 0; i < 3; i++) { for (j = 0; j < 4; j++) { printf("b[%d][%d] = ", i, j); scanf("%d", &b[i][j]); } } int k; int c[4][4] = {0}; for (i = 0; i < 4; i++) { for (k = 0; k < 4; k++) { for (j = 0; j < 3; j++) { c[i][k] += a[i][j] * b[j][k]; } } } puts("output the multiply of the two matrix."); for (i = 0; i < 4; i++) { for (j = 0; j < 4; j++) { printf("%d ", c[i][j]); } putchar('\n'); } return 0; }
↓
#include <stdio.h>
int main(void) { int a[2][4], b[4][5]; int i, j; puts("please input the elements of the 2 * 4 matrix"); for (i = 0; i < 2; i++) { for (j = 0; j < 4; j++) { printf("a[%d][%d] = ", i, j); scanf("%d", &a[i][j]); } } puts("please input the elements of the 4 * 5 matrix"); for (i = 0; i < 4; i++) { for (j = 0; j < 5; j++) { printf("b[%d][%d] = ", i, j); scanf("%d", &b[i][j]); } } int c[2][5] = {0}; int k; for (i = 0; i < 2; i++) { for (k = 0; k < 5; k++) { for (j = 0; j < 4; j++) { c[i][k] += a[i][j] * b[j][k]; } } } puts("output the multiply of the two matrix."); for (i = 0; i < 2; i++) { for (j = 0; j < 5; j++) { printf("%d ", c[i][j]); } putchar('\n'); } return 0; }
