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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3.  
  4. //必要があれば変数などを追加してもOKです
  5.  
  6. int main(){
  7.     int i,j;
  8.     int a,b;
  9.     int **mat;
  10.     scanf("%d %d",&a,&b);
  11.      mat = (int **)malloc(sizeof(int *)*a);
  12.     if(mat == NULL){
  13.         printf("ERROR");
  14.         return 0;
  15.     }
  16.     for(i=0;i<a;i++){
  17.         mat[i] = (int *)malloc(sizeof(int)*b);
  18.         if(mat[i] == NULL){
  19.             printf("ERROR");
  20.             return 0;
  21.         }
  22.     }
  23.     for(i=0;i<a;i++){
  24.         for(j=0;j<b;j++){
  25.             mat[i][j] = i*b+j+1;
  26.         }
  27.     }
  28.  
  29.     for(i=0;i<a;i++){
  30.         for(j=0;j<b;j++){
  31.             printf("%d ",mat[i][j]);
  32.         }
  33.         printf("\n");
  34.     }
  35.     for(i=0;i<a;i++){
  36.         free(mat[i]);
  37.     }
  38.     free(mat);
  39.     return 0;
  40. }
  41.  
  42.  
Success #stdin #stdout 0.01s 5288KB
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https://ideone.com/9AlHHD
language:
C (gcc 8.3)
created:
8 days ago
visibility:
public

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