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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,k=1;
  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\n");
  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\n");
  20.     		return 0;
  21.     	}
  22.     }
  23.     for(i=0;i<a;i++){
  24.     	for(j=0;j<b;j++){
  25.     		mat[i][j]=k++;
  26.     		printf("%d ",mat[i][j]);
  27.     	}
  28.     	printf("\n");
  29.     }
  30.     for(i=0;i<a;i++){
  31.     	free(mat[i]);
  32.     }
  33.     free(mat);
  34.     return 0;
  35. }
  36.  
Success #stdin #stdout 0s 5308KB
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stdout
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https://ideone.com/MnjQdU
language:
C (gcc 8.3)
created:
21 hours ago
visibility:
public

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