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  1. #include <stdio.h>
  2.  
  3. void array_mul( int (*x)[2], int (*y)[2], int (*ans)[2]){
  4. 	int i,j,k;
  5. 	for(i=0;i<2;i++){
  6. 		for(j=0;j<2;j++){
  7. 			ans[i][j]=0;  //初期化
  8. 				for(k=0;k<2;k++){
  9. 					ans[i][j]+=x[i][k]*y[k][j];
  10. 				}
  11. 		}
  12. 	}
  13. }
  14.  
  15. int main(void) {
  16. 	int x[2][2]={{1,2},{3,4}};
  17. 	int y[2][2]={{1,2},{3,4}};
  18.  
  19. 	int ans[2][2];
  20.  
  21. 	int i,j;
  22.  
  23. 	array_mul(x, y, ans);
  24.  
  25.     for (i = 0; i < 2; i++) {
  26.         for (j = 0; j < 2; j++) {
  27.             printf("%d ", ans[i][j]);
  28.         }
  29.                 printf("\n");
  30.     }
  31. 	return 0;
  32. }
  33.  
Success #stdin #stdout 0s 5312KB
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https://ideone.com/TSsGRi
language:
C (gcc 8.3)
created:
2 days ago
visibility:
public

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