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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3.  
  4. int main() {
  5.     int a, b;
  6.  
  7.     if (scanf("%d %d", &a, &b) != 2 || a <= 0 || b <= 0) {
  8.         printf("invalid\n");
  9.         return 1;
  10.     }
  11.  
  12.     int **matrix = (int **)malloc(a * sizeof(int *));
  13.     for (int i = 0; i < a; i++) {
  14.         matrix[i] = (int *)malloc(b * sizeof(int));
  15.     }
  16.  
  17.     int num = 1;
  18.     for (int i = 0; i < a; i++) {
  19.         for (int j = 0; j < b; j++) {
  20.             matrix[i][j] = num++;
  21.         }
  22.     }
  23.  
  24.     for (int i = 0; i < a; i++) {
  25.         for (int j = 0; j < b; j++) {
  26.             printf("%d ", matrix[i][j]);
  27.         }
  28.         printf("\n");
  29.     }
  30.  
  31.     //A.メモリの解放
  32.     for (int i = 0; i < a; i++) {
  33.         free(matrix[i]);
  34.     }
  35.     free(matrix);
  36.  
  37.     return 0;
  38. }
Success #stdin #stdout 0.01s 5276KB
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https://ideone.com/Rdwc1W
language:
C (gcc 8.3)
created:
4 days ago
visibility:
public

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