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  1. #include <stdio.h>
  2. void array_mul(int (*x)[2], int (*y)[2], int (*ans)[2]) {
  3.     int i, j, k;
  4.     for(i = 0; i < 2; i++){
  5.         for(j = 0; j < 2; j++){
  6.             ans[i][j] = 0;
  7.             for(k = 0; k < 2; k++){
  8.                 ans[i][j] += x[i][k] * y[k][j];
  9.             }
  10.         }
  11.     }
  12.     for(i = 0; i < 2; i++){
  13.         for(j = 0; j < 2; j++){
  14.             printf("%d ", ans[i][j]);
  15.         }
  16.         printf("\n");
  17.     }
  18. }
  19. int main(void) {
  20.     int x[2][2] = { {1,2},{3,4} };
  21.     int y[2][2] = { {1,2},{3,4} };
  22.     int ans[2][2];
  23.  
  24.     array_mul(x, y, ans);
  25.  
  26.     return 0;
  27. }
Success #stdin #stdout 0s 5308KB
comments (?)
stdin 
Standard input is empty
stdout 
7 10 
15 22
https://ideone.com/bLOQEg
language:
C (gcc 8.3)
created:
4 days ago
visibility:
public

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