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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. {
  7. 	int x[2][2] = { 1,2,3,4 };
  8. 	int y[2][2] = { 1,2,3,4 };
  9. 	int ans[2][2] = { 0 };
  10.  
  11. 	array_mul( x, y, ans );
  12. 	return 0;
  13. }
  14.  
  15. void array_mul(int (*x)[2], int (*y)[2], int (*ans)[2]) {
  16.     for (int i = 0; i < 2; i++) {
  17.         for (int j = 0; j < 2; j++) {
  18.             ans[i][j] = 0;
  19.             for (int k = 0; k < 2; k++) {
  20.                 ans[i][j] += x[i][k] * y[k][j];
  21.             }
  22.         }
  23.     }
  24.  
  25.     for (int i = 0; i < 2; i++) {
  26.         for (int j = 0; j < 2; j++) {
  27.             printf("%d ", ans[i][j]);
  28.         }
  29.         printf("\n");
  30.     }
  31. }
Success #stdin #stdout 0.01s 5324KB
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https://ideone.com/BUfkUv
language:
C (gcc 8.3)
created:
2 days ago
visibility:
public

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