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  1. #include <stdio.h>
  2.  
  3. void array_mul(int (*x)[2], int (*y)[2], int (*ans)[2]) {
  4.  
  5.  
  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];
  11.             }
  12.         }
  13.     }
  14.  
  15.  
  16.     for (int i = 0; i < 2; i++) {
  17.         for (int j = 0; j < 2; j++) {
  18.             printf("%d ", ans[i][j]);
  19.         }
  20.         printf("\n");
  21.     }
  22. }
  23.  
  24. int main() {
  25.     int x[2][2] = {1,2 , 3,4};
  26.  
  27.     int y[2][2] = {1,2 , 3,4};
  28.  
  29.     int ans[2][2];
  30.  
  31.     array_mul(x, y, ans);
  32.  
  33.     return 0;
  34. }
  35.  
  36.  
Success #stdin #stdout 0s 5276KB
comments (?)
stdin 
Standard input is empty
stdout 
7 10 
15 22
https://ideone.com/CqkYV9
language:
C (gcc 8.3)
created:
4 days ago
visibility:
public

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