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  1. #include <stdio.h>
  2.  
  3. void array_mul(int (*x)[2],int (*y)[2],int (*ans)[2])
  4. {
  5. 	for(int i=0;i<2;i++) //行
  6. 	{
  7. 		for(int j=0;j<2;j++) //列
  8. 		{
  9. 			ans[i][j] = 0;
  10. 			for(int d=0;d<2;d++)
  11. 			{
  12. 				ans[i][j] += x[i][d] * y[d][j];
  13. 			}
  14. 		}
  15. 	}
  16.  
  17.  
  18. }
  19.  
  20.  
  21. int main(void) {
  22. 	int ans[2][2];
  23. 	int x[2][2] = { {1,2},
  24. 					{3,4} };
  25. 	int y[2][2] = { {1,2},
  26. 					{3,4} };
  27. 	array_mul(x,y,ans);
  28. 	for(int k=0;k<2;k++)
  29. 	{
  30. 		for(int f=0;f<2;f++)
  31. 		{
  32. 			printf("%d ",ans[k][f]);
  33. 		}
  34. 		printf("\n");
  35. 	}
  36. 	return 0;
  37. }
  38.  
Success #stdin #stdout 0s 5284KB
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https://ideone.com/5HMKnv
language:
C (gcc 8.3)
created:
2 days ago
visibility:
public

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