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  1. #include <stdio.h>
  2.  
  3. void array_mul(int(*x)[2], int (*y)[2], int (*ans)[2]);
  4. int main(void) {
  5. 	int x[2][2] = {{1,2}, {3,4}}, y[2][2] = {{1,2}, {3,4}}, ans[2][2] = {0};
  6. 	array_mul(x, y, ans);
  7. 	for(int i=0; i<2; i++){
  8. 		for(int j=0; j<2; j++){
  9. 			printf("ans[%d][%d] = %d\n" ,i,j,ans[i][j]);
  10. 		}
  11. 	}
  12. 	return 0;
  13. }
  14.  
  15. void array_mul(int(*x)[2], int (*y)[2], int (*ans)[2]){
  16. 	for(int i=0; i<2; i++){
  17. 		for(int j=0; j<2; j++){
  18. 			for(int k=0; k<2; k++){
  19. 				ans[i][j] += x[i][k]*y[k][j];
  20. 			}
  21. 		}
  22. 	}
  23.  
  24. }
  25.  
  26.  
  27. //a00 = x00*y00 + x01*y10 
  28. //a01 = x00*y01 + x11*y11
  29. //a10 = x10*y00 + x01*y10
  30. //a11 = x10*y01 + x11*y11
Success #stdin #stdout 0.01s 5280KB
comments (?)
stdin 
Standard input is empty
stdout 
ans[0][0] = 7
ans[0][1] = 10
ans[1][0] = 15
ans[1][1] = 22
https://ideone.com/IARSFD
language:
C (gcc 8.3)
created:
4 days ago
visibility:
public

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