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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] = {0};
  10.  
  11.     int i, j;
  12.  
  13.     array_mul(x, y, ans);
  14.  
  15.     printf("計算結果(ans):\n");
  16.     for (i = 0; i < 2; i++) {
  17.         for (j = 0; j < 2; j++) {
  18.             printf("%d ", ans[i][j]);
  19.         }
  20.         printf("\n");
  21.     }
  22.  
  23.     return 0;
  24. }
  25.  
  26. void array_mul(int (*x)[2], int (*y)[2], int (*ans)[2])
  27. {
  28.     int i, j, k;
  29.  
  30.     for (i = 0; i < 2; i++) {
  31.         for (j = 0; j < 2; j++) {
  32.             ans[i][j] = 0;
  33.             for (k = 0; k < 2; k++) {
  34.                 ans[i][j] += x[i][k] * y[k][j];
  35.             }
  36.         }
  37.     }
  38. }
Success #stdin #stdout 0.01s 5312KB
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stdin
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Standard input is empty
stdout
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計算結果(ans):
7 10 
15 22
https://ideone.com/xGuRKV
language:
C (gcc 8.3)
created:
2 days ago
visibility:
public

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