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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 main(void) {
  6.     int x[2][2] = {{1, 2}, {3, 4}};
  7.     int y[2][2] = {{1, 2}, {3, 4}};
  8.     int ans[2][2];
  9.  
  10.     array_mul(x, y, ans);
  11.      for (int i = 0; i < 2; i++) {
  12.         for (int j = 0; j < 2; j++) {
  13.             printf("%d ",ans[i][j]);
  14.         }
  15.         printf("\n");
  16.      }
  17.     return 0;
  18. }
  19.  
  20. void array_mul(int (*x)[2], int (*y)[2], int (*ans)[2]) {
  21.     for (int i = 0; i < 2; i++) {
  22.         for (int j = 0; j < 2; j++) {
  23.             ans[i][j] = 0;
  24.             for (int z = 0;z < 2; z++){
  25.             	ans[i][j] = ans[i][j]+x[i][z]*y[z][j];
  26.             }
  27.         }
  28.     }
  29. }
  30.  
Success #stdin #stdout 0.01s 5312KB
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https://ideone.com/EdhZhh
language:
C (gcc 8.3)
created:
4 days ago
visibility:
public

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