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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("ERROR\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("ERROR\n");
  19. 			for(j=0;j<i;j++){
  20. 				free(mat[j]);
  21. 			}
  22. 			free(mat);
  23. 			return 0;
  24. 		}
  25. 	}
  26.  
  27. 	k=1;
  28. 	for(i=0;i<a;i++){
  29. 		for(j=0;j<b;j++){
  30. 			mat[i][j]=k;
  31. 			k++;
  32. 		}
  33. 	}
  34.  
  35.     //以下の部分は表示の部分です
  36.     //いじらなくてOK
  37.     for(i=0;i<a;i++){
  38.         for(j=0;j<b;j++){
  39.             printf("%d ",mat[i][j]);
  40.         }
  41.         printf("\n");
  42.     }
  43.     for(i=0;i<a;i++){
  44.     	free(mat[i]);
  45.     }
  46.     free(mat);
  47.  
  48.  
  49.     return 0;
  50. }
  51.  
Success #stdin #stdout 0s 5348KB
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stdout
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4 5 6
https://ideone.com/L8KflY
プロ演4 2-1
language:
C (gcc 8.3)
created:
2 days ago
visibility:
public

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