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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++) {         
  6.         for (int j = 0; j < 2; j++) {      
  7.             ans[i][j] = 0;
  8.             for (int k = 0; k < 2; k++) {  
  9.                 ans[i][j] += x[i][k] * y[k][j];
  10.             }
  11.         }
  12.     }
  13.  
  14.  
  15.     for (int i = 0; i < 2; i++) {
  16.         for (int j = 0; j < 2; j++) {
  17.             printf("%d ", ans[i][j]);
  18.         }
  19.         printf("\n");
  20.     }
  21. }
  22.  
  23. int main() {
  24.     int x[2][2] = {1,2 , 3,4};
  25.  
  26.     int y[2][2] = {1,2 , 3,4};
  27.  
  28.     int ans[2][2];
  29.  
  30.     array_mul(x, y, ans);
  31.  
  32.     return 0;
  33. }
  34.  
  35.  
Success #stdin #stdout 0s 5308KB
comments (?)
stdin 
Standard input is empty
stdout 
7 10 
15 22
https://ideone.com/5MrfT6
language:
C (gcc 8.3)
created:
2 days ago
visibility:
public

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