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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. 	for(int i=0;i<2;i++){
  13. 		for(int j=0;j<2;j++){
  14. 			printf("%2d ",ans[i][j]);
  15. 		}
  16. 		printf("\n");
  17. 	}
  18. 	return 0;
  19. }
  20. void array_mul( int (*x)[2], int (*y)[2], int (*ans)[2] ){
  21.  
  22. 	for(int i=0;i<2;i++){
  23. 		for(int j=0;j<2;j++){
  24. 			ans[i][j]=0;
  25. 			for(int k=0;k<2;k++){
  26. 				ans[i][j]+=x[i][k]*y[k][j];
  27. 			}
  28. 		}
  29.  
  30. 	}
  31.  
  32. }
  33.  
Success #stdin #stdout 0s 5308KB
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https://ideone.com/MqbXI4
language:
C (gcc 8.3)
created:
2 days ago
visibility:
public

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