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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.    	int x[2][2]={
  7. 		{1, 2},
  8. 		{3, 4}
  9. 	};
  10.     int y[2][2]={
  11. 		{1, 2},
  12. 		{3, 4}
  13. 	};
  14.     int ans[2][2]; 
  15.  
  16. 	array_mul(x, y, ans);
  17.  
  18. 	for(int i=0;i<2;i++){
  19. 		for (int j=0;j<2;j++){
  20. 			printf("%4d", ans[i][j]);
  21. 		}
  22.  		printf("\n");
  23. 	}
  24.  
  25. 	return 0;
  26. }
  27.  
  28. void array_mul(int (*x)[2],int (*y)[2],int (*ans)[2]){
  29. 	for (int i=0;i<2;i++){
  30. 		for (int j=0;j<2;j++){
  31. 			ans[i][j]=0; 
  32. 			for (int k=0;k<2;k++) { 
  33. 				ans[i][j]+=x[i][k]*y[k][j];
  34. 			}
  35. 		}
  36. 	}
  37. }
Success #stdin #stdout 0s 5320KB
comments (?)
stdin 
Standard input is empty
stdout 
   7  10
  15  22
https://ideone.com/J9Ul7e
language:
C (gcc 8.3)
created:
3 days ago
visibility:
public

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