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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3. //1
  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.     //さて，最後に忘れずにすることと言えば？メモリの開放
  32.       for(i = 0; i < a; i++){
  33.         free(mat[i]);
  34.         }
  35.     free(mat);
  36.  
  37.     return 0;
  38. }
  39.  
Success #stdin #stdout 0s 5316KB
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https://ideone.com/3r5Wwf
language:
C (gcc 8.3)
created:
1 day ago
visibility:
public

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