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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. 	//ここで2次元配列の動的確保をする
  13.     mat = (int**)malloc(sizeof(int*)*a);
  14.  	if(mat == NULL){ printf("ERROR\n"); return 0;  }
  15. 	for (i = 0; i <a; i++) {
  16. 	mat[i] = (int*)malloc(sizeof(int)*b);
  17.  	if(mat[i]==NULL){printf("ERROR\n");  return 0;  } 
  18. 	}
  19. 	for (i=0; i<a; i++) {
  20. 	for (j=0; j<b; j++) {
  21. 	mat[i][j]=k++;
  22. 	}
  23. 	}
  24.  
  25.  
  26.  
  27.     for(i=0;i<a;i++){
  28.     for(j=0;j<b;j++){
  29.     printf("%d ",mat[i][j]);
  30.     }
  31.     printf("\n");
  32.     }
  33.     for(i=0;i<a;i++){
  34. 	free(mat[i]);
  35. 	}
  36. 	free(mat);
  37.  
  38.  
  39.     return 0;
  40.     }
  41.  
Success #stdin #stdout 0s 5280KB
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https://ideone.com/RhOxvQ
language:
C (gcc 8.3)
created:
13 days ago
visibility:
public

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