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  1. #include <stdio.h>
  2.  
  3. void array_mul(const int (*x)[2], const int (*y)[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.     array_mul(x, y);
  12.  
  13.     return 0;
  14. }
  15.  
  16. void array_mul(const int (*x)[2], const int (*y)[2])
  17. {
  18.     printf("multiplication\n");
  19.  
  20.     for (int i = 0; i < 2; i++) {
  21.         for (int j = 0; j < 2; j++) {
  22.  
  23.             int sum = 0;
  24.             for (int k = 0; k < 2; k++) {
  25.                 sum += x[i][k] * y[k][j];
  26.             }
  27.  
  28.             printf("%d ", sum);
  29.         }
  30.     }
  31. }
Success #stdin #stdout 0s 5288KB
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Standard input is empty
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multiplication
7 10 15 22
https://ideone.com/NcmYfG
language:
C (gcc 8.3)
created:
4 days ago
visibility:
public

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