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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;
  8.     int a,b;
  9.     int **mat;
  10.     scanf("%d %d",&a,&b);
  11.  
  12.     mat = (int**)malloc(sizeof(int*)*a);
  13.     if(mat==NULL){ printf("ERROR\n"); return 0; }
  14.     for(i = 0; i < a; i++) {
  15.     	mat[i] = (int*)malloc(sizeof(int)*b);
  16.     	if(mat[i] == NULL){ printf("ERROR\n"); return 0; }
  17.     }
  18.     for(i = 0; i < a; i++){
  19.     	for(j = 0; j < b; j++) {
  20.     		mat[i][j] = k++;
  21.     	}
  22.     }
  23.  
  24.     for(i=0;i<a;i++){
  25.         for(j=0;j<b;j++){
  26.             printf("%d ",mat[i][j]);
  27.         }
  28.         printf("\n");
  29.     }
  30.  
  31.     for(i = 0; i < a; i++){
  32.     	free(mat[i]);
  33.     }
  34.     free(mat);
  35.  
  36.     return 0;
  37. }
  38.  
Success #stdin #stdout 0s 5408KB
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https://ideone.com/cdSoyj
language:
C (gcc 8.3)
created:
337 days ago
visibility:
public

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