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  1. #include <stdio.h>
  2.  
  3. void array_mul(int (*x)[2], int (*y)[2], int (*ans)[2]) {
  4.     int i, j, k;
  5.  
  6.     for (i = 0; i < 2; i++) {
  7.     for (j = 0; j < 2; j++) {
  8.     ans[i][j] = 0;  
  9.  
  10.     for (k = 0; k < 2; k++) {
  11.                 ans[i][j] += x[i][k] * y[k][j];
  12.             }}}
  13.  
  14.  
  15.     printf("ans:\n");
  16.     for (i = 0; i < 2; i++) {
  17.         for (j = 0; j < 2; j++) {
  18.             printf("%d ", ans[i][j]);
  19.         }
  20.         printf("\n");
  21.     }
  22. }
  23.  
  24. int main(void) {
  25.     int x[2][2] = {
  26.         {1, 2},
  27.         {3, 4}
  28.     };
  29.  
  30.     int y[2][2] = {
  31.         {1, 2},
  32.         {3, 4}
  33.     };
  34.  
  35.     int ans[2][2];  
  36.  
  37.     array_mul(x, y, ans);
  38.  
  39.     return 0;
  40. }
  41.  
  42.  
Success #stdin #stdout 0.01s 5288KB
comments (?)
stdin
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Standard input is empty
stdout
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ans:
7 10 
15 22
https://ideone.com/SkKKMb
language:
C (gcc 8.3)
created:
3 days ago
visibility:
public

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