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  1. #include <stdio.h>
  2.  
  3. // ans = x * y + z を計算する関数
  4. void cal_array(int x[2][3], int y[3][2], int z[2][2], int ans[2][2]) {
  5.     int i, j, k;
  6.  
  7.     // x * y を計算
  8.     for (i = 0; i < 2; i++) {
  9.         for (j = 0; j < 2; j++) {
  10.             ans[i][j] = 0;
  11.             for (k = 0; k < 3; k++) {
  12.                 ans[i][j] += x[i][k] * y[k][j];
  13.             }
  14.         }
  15.     }
  16.  
  17.     // z を加算
  18.     for (i = 0; i < 2; i++) {
  19.         for (j = 0; j < 2; j++) {
  20.             ans[i][j] += z[i][j];
  21.         }
  22.     }
  23. }
  24.  
  25. int main(void) {
  26.     // 2x3 行列
  27.     int x[2][3] = {
  28.         {1, 2, 3},
  29.         {4, 5, 6}
  30.     };
  31.  
  32.     // 3x2 行列
  33.     int y[3][2] = {
  34.         {6, 5},
  35.         {4, 3},
  36.         {2, 1}
  37.     };
  38.  
  39.     // 2x2 行列
  40.     int z[2][2] = {
  41.         {10, 6},
  42.         {4, 9}
  43.     };
  44.  
  45.     int ans[2][2];
  46.     int i, j;
  47.  
  48.     cal_array(x, y, z, ans);
  49.  
  50.     // 出力
  51.     printf("ans = \n");
  52.     for (i = 0; i < 2; i++) {
  53.         for (j = 0; j < 2; j++) {
  54.             printf("%4d", ans[i][j]);
  55.         }
  56.         printf("\n");
  57.     }
  58.  
  59.     return 0;
  60. }
  61.  
Success #stdin #stdout 0s 5316KB
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stdin
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Standard input is empty
stdout
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ans = 
  30  20
  60  50
https://ideone.com/PNeyMJ
language:
C99 (gcc 8.3)
created:
9 days ago
visibility:
public

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