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  1. #include <stdio.h>
  2.  
  3. void array_mul(int (*x)[2], int (*y)[2], int (*ans)[2]) {
  4.     for (int i = 0; i < 2; i++) {
  5.         for (int j = 0; j < 2; j++) {
  6.             ans[i][j] = 0; 
  7.             for (int k = 0; k < 2; k++) {
  8.                 ans[i][j] += x[i][k] * y[k][j];
  9.             }
  10.         }
  11.     }
  12. }
  13. int main(void) {
  14. 	int x[2][2]={{1,2},{3,4}};
  15. 	int y[2][2]={{1,2},{3,4}};
  16. 	int ans[2][2];
  17.  
  18. 	array_mul(x, y, ans);
  19. 	for (int i = 0; i < 2; i++) {
  20.         for (int j = 0; j < 2; j++) {
  21.             printf("%4d", ans[i][j]); 
  22.         }
  23.         printf("\n");
  24.     }
  25.  
  26.     return 0;
  27. }
Success #stdin #stdout 0.01s 5320KB
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https://ideone.com/gY8JBV
language:
C99 (gcc 8.3)
created:
4 days ago
visibility:
public

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