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  1. #include <stdio.h>
  2. void array_mul(int (*x)[2], int (*y)[2], int (*ans)[2]);
  3. int main(void)
  4. {
  5.     int x[2][2] = {
  6.         {1, 2},
  7.         {3, 4}
  8.     };
  9.     int y[2][2] = {
  10.         {1, 2},
  11.         {3, 4}
  12.     };
  13.     int ans[2][2] = {0};
  14.  
  15.     array_mul(x, y, ans);
  16.  
  17.     for (int i = 0; i < 2; i++) {
  18.         for (int j = 0; j < 2; j++) {
  19.             printf("%d ", ans[i][j]);
  20.         }
  21.         printf("\n");
  22.     }
  23.     return 0;
  24. }
  25. void array_mul(int (*x)[2], int (*y)[2], int (*ans)[2])
  26. {
  27.     for (int i = 0; i < 2; i++) {
  28.         for (int j = 0; j < 2; j++) {
  29.             ans[i][j] = 0;
  30.             for (int k = 0; k < 2; k++) {
  31.                 ans[i][j] += x[i][k] * y[k][j];
  32.             }
  33.         }
  34.     }
  35. }
Success #stdin #stdout 0.01s 5280KB
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https://ideone.com/8TudXa
language:
C (gcc 8.3)
created:
8 hours ago
visibility:
public

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