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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3. int main() {
  4.     int rows = 3;
  5.     int cols = 4;
  6.     int **array;
  7.     // 行のポインタ配列を確保
  8.     array = (int **)malloc(rows * sizeof(int *));
  9.     // 各行のメモリを確保
  10.     for (int i = 0; i < rows; i++) {
  11.         array[i] = (int *)malloc(cols * sizeof(int));
  12.     }
  13.     // 配列を使用
  14.     for (int i = 0; i < rows; i++) {
  15.         for (int j = 0; j < cols; j++) {
  16.             array[i][j] = i * cols + j;
  17.             printf("%d ", array[i][j]);
  18.         }
  19.         printf("\n");
  20.     }
  21.     // メモリを解放
  22.     for (int i = 0; i < rows; i++) {
  23.         free(array[i]);
  24.     }
  25.     free(array);
  26.     return 0;
  27. }
Success #stdin #stdout 0s 5284KB
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https://ideone.com/U0Pekk
language:
C (gcc 8.3)
created:
7 days ago
visibility:
public

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