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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3.  
  4. int main(){
  5.     int i,j;
  6.     int a,b;
  7.     int **mat;
  8.     scanf("%d %d",&a,&b);
  9.  
  10.     // 2次元配列の動的確保
  11.     mat = (int **)malloc(sizeof(int *) * a);
  12.     if (mat == NULL) {
  13.         printf("Memory allocation failed.\n");
  14.         exit(1);
  15.     }
  16.     for (i = 0; i < a; i++) {
  17.         mat[i] = (int *)malloc(sizeof(int) * b);
  18.         if (mat[i] == NULL) {
  19.             printf("Memory allocation failed.\n");
  20.             exit(1);
  21.         }
  22.     }
  23.  
  24.     // 2次元配列に数値を代入する
  25.     for(i = 0; i < a; i++){
  26.         for(j = 0; j < b; j++){
  27.             scanf("%d", &mat[i][j]);
  28.         }
  29.     }
  30.  
  31.     // 配列の表示
  32.     for(i = 0; i < a; i++){
  33.         for(j = 0; j < b; j++){
  34.             printf("%d ", mat[i][j]);
  35.         }
  36.         printf("\n");
  37.     }
  38.  
  39.     // メモリの解放
  40.     for (i = 0; i < a; i++) {
  41.         free(mat[i]);
  42.     }
  43.     free(mat);
  44.  
  45.     return 0;
  46. }
Success #stdin #stdout 0.01s 5300KB
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https://ideone.com/uLvDUX
language:
C (gcc 8.3)
created:
13 days ago
visibility:
public

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