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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3.  
  4. int main(){
  5.     int i,j,k;
  6.     int a,b;
  7.     int **mat;
  8.     scanf("%d %d",&a,&b);
  9.  
  10.     mat = (int **)malloc(sizeof(int *)*a);
  11.     if(mat == NULL){
  12.         printf("エラー\n");
  13.         return 0;
  14.     }
  15.     for(i=0;i<a;i++){
  16.         mat[i] = (int *)malloc(sizeof(int)*b);
  17.         if(mat[i] == NULL){
  18.             printf("エラー\n");
  19.             return 0;
  20.         }
  21.     }
  22.     k = 1;
  23.     for(i=0;i<a;i++){
  24.         for(j=0;j<b;j++){
  25.             mat[i][j] = k++;
  26.         }
  27.     }
  28.     for(i=0;i<a;i++){
  29.         for(j=0;j<b;j++){
  30.             printf("%d ",mat[i][j]);
  31.         }
  32.         printf("\n");
  33.     }
  34.     for(i=0;i<a;i++){
  35.         free(mat[i]);
  36.     }
  37.     free(mat);
  38.     return 0;
  39. }
  40.  
Success #stdin #stdout 0s 5272KB
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stdout
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https://ideone.com/rKi1dP
language:
C (gcc 8.3)
created:
8 days ago
visibility:
public

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