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  1. #include <stdio.h>
  2.  
  3. void array_mul(int (*x)[2], int (*y)[2], int (*ans)[2]) {
  4.     for (int i = 0; i < 2; i++) {
  5.         for (int j = 0; j < 2; j++) {
  6.             ans[i][j] = 0;
  7.             for (int k = 0; k < 2; k++) {
  8.                 ans[i][j] += x[i][k] * y[k][j];
  9.             }
  10.         }
  11.     }
  12. }
  13.  
  14. int main(void) {
  15.     int x[2][2] = { {1, 2}, {3, 4} };
  16.     int y[2][2] = { {1, 2}, {3, 4} };
  17.     int ans[2][2];
  18.  
  19.     array_mul(x, y, ans);
  20.  
  21.     for (int i = 0; i < 2; i++) {
  22.         for (int j = 0; j < 2; j++) {
  23.             printf("ans[%d][%d] = %d\n", i, j, ans[i][j]);
  24.         }
  25.     }
  26.  
  27.     return 0;
  28. }
Success #stdin #stdout 0.01s 5300KB
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stdin
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Standard input is empty
stdout
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ans[0][0] = 7
ans[0][1] = 10
ans[1][0] = 15
ans[1][1] = 22
https://ideone.com/9qhGUq
language:
C (gcc 8.3)
created:
2 days ago
visibility:
public

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