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  1. #include <stdio.h>
  2.  
  3. void array_mul(int (*x)[2], int (*y)[2], int (*ans)[2])
  4. {
  5.     int i, j, k;
  6.  
  7.     for (i = 0; i < 2; i++) {        
  8.         for (j = 0; j < 2; j++) {    
  9.  
  10.             ans[i][j] = 0;          
  11.  
  12.             for (k = 0; k < 2; k++) {   
  13.                 ans[i][j] += x[i][k] * y[k][j];
  14.             }
  15.         }
  16.     }
  17. }
  18.  
  19. int main(void)
  20. {
  21.     int x[2][2] = {
  22.         {1, 2},
  23.         {3, 4}
  24.     };
  25.  
  26.     int y[2][2] = {
  27.         {1, 2},
  28.         {3, 4}
  29.     };
  30.  
  31.     int ans[2][2];  
  32.  
  33.     array_mul(x, y, ans);   
  34.  
  35.     printf("%d %d\n", ans[0][0], ans[0][1]);
  36.     printf("%d %d\n", ans[1][0], ans[1][1]);
  37.  
  38.     return 0;
  39. }
  40.  
Success #stdin #stdout 0.01s 5320KB
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https://ideone.com/nyNGfX
language:
C (gcc 8.3)
created:
2 days ago
visibility:
public

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