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  1. #include <stdio.h>
  2.  
  3. int ans[2][2];
  4.  
  5. void array_mul(int (*x)[2],int (*y)[2],int (*ans)[2]){
  6. 	for(int i=0;i<2;i++){
  7. 		for(int j=0;j<2;j++){
  8. 			ans[i][j]=0;
  9. 			for(int k=0;k<2;k++){
  10. 				ans[i][j]=x[i][k]*y[k][j]+ans[i][j];
  11. 			}
  12. 		}
  13. 	}
  14. }
  15.  
  16. int main(){
  17. 	int x[2][2]={{1,2},{3,4}};
  18. 	int y[2][2]={{1,2},{3,4}};
  19. 	array_mul(x,y,ans);
  20. 	printf("行列xと行列yの内積\nans={%d,%d}\n   ,{%d,%d}",ans[0][0],ans[0][1],ans[1][0],ans[1][1]);
  21. 	return 0;
  22. }
Success #stdin #stdout 0.01s 5284KB
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stdin
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Standard input is empty
stdout
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行列xと行列yの内積
ans={7,10}
   ,{15,22}
https://ideone.com/X0CRhN
language:
C (gcc 8.3)
created:
10 days ago
visibility:
public

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