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  1. #include <stdio.h>
  2.  
  3. void array_mul(int (*x)[2], int (*y)[2], int (*ans)[2]);
  4.  
  5. int main(void)
  6. {
  7.     int x[2][2] = { {1, 2}, {3, 4} };
  8.     int y[2][2] = { {1, 2}, {3, 4} };
  9.     int ans[2][2];
  10.  
  11.     array_mul(x, y, ans);
  12.  
  13.     return 0;
  14. }
  15.  
  16. void array_mul(int (*x)[2], int (*y)[2], int (*ans)[2])
  17. {
  18.     for (int i = 0; i < 2; i++) {
  19.         for (int j = 0; j < 2; j++) {
  20.             ans[i][j] = 0;
  21.             for (int k = 0; k < 2; k++) {
  22.                 ans[i][j] += x[i][k] * y[k][j];
  23.             }
  24.             printf("%d行%d列目の値は%d\n", i + 1, j + 1, ans[i][j]);
  25.         }
  26.     }
  27. }
  28.  
Success #stdin #stdout 0.01s 5288KB
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stdin
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Standard input is empty
stdout
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1行1列目の値は7
1行2列目の値は10
2行1列目の値は15
2行2列目の値は22
https://ideone.com/4TeYPn
language:
C (gcc 8.3)
created:
2 days ago
visibility:
public

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