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  1. #include <stdio.h>
  2.  
  3. void array_mul(const int (*x)[2], const int (*y)[2], int (*ans)[2]);
  4.  
  5. int main(void)
  6. {
  7.     int x[2][2] = { {1, 2},
  8.                          {3, 4} };
  9.     int y[2][2] = { {1, 2},
  10.                          {3, 4} };
  11.     int ans[2][2] = {0};
  12.     array_mul(x, y, ans);
  13.  
  14.     printf("multiplication\n");
  15.     for (int i = 0; i < 2; i++) {
  16.         for (int j = 0; j < 2; j++) {
  17.             printf("%d ", ans[i][j]);
  18.         }
  19.         putchar('\n');
  20.     }
  21.  
  22.     return 0;
  23. }
  24.  
  25. void array_mul(const int (*x)[2], const 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.  
  36.     }
  37.  
  38. }
Success #stdin #stdout 0s 5328KB
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stdin
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Standard input is empty
stdout
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multiplication
7 10 
15 22
https://ideone.com/IiDWXw
language:
C (gcc 8.3)
created:
2 days ago
visibility:
public

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