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  1.  
  2.     // #include <stdio.h>
  3. #include <stdlib.h>
  4.  
  5. int main() {
  6.     int a, b;
  7.     int i, j, k = 1;
  8.     int **mat;
  9.     printf("行数と列数を入力してください: ");
  10.     scanf("%d %d", &a, &b);
  11.  
  12.     mat = malloc(sizeof(int*) * a);
  13.     if (mat == NULL) {
  14.         printf("メモリ確保に失敗しました\n");
  15.         return 1;
  16.     }
  17.  
  18.  
  19.     for (i = 0; i < a; i++) {
  20.         mat[i] = malloc(sizeof(int) * b);
  21.         if (mat[i] == NULL) {
  22.             printf("メモリ確保に失敗しました\n");
  23.             return 1;
  24.         }
  25.     }
  26.  
  27.  
  28.     for (i = 0; i < a; i++) {
  29.         for (j = 0; j < b; j++) {
  30.             mat[i][j] = k++;
  31.         }
  32.     }
  33.  
  34.     for (i = 0; i < a; i++) {
  35.         for (j = 0; j < b; j++) {
  36.             printf("%d ", mat[i][j]);
  37.         }
  38.         printf("\n");
  39.     }
  40.  
  41.  
  42.     for (i = 0; i < a; i++) {
  43.         free(mat[i]);
  44.     }
  45.     free(mat);
  46.  
  47.     return 0;
  48. }
  49.  
  50.  
Success #stdin #stdout 0s 5284KB
comments (?)
stdin 
3 2
stdout 
行数と列数を入力してください: 1 2 
3 4 
5 6
https://ideone.com/DMdOHZ
language:
C (gcc 8.3)
created:
8 days ago
visibility:
public

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