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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("エラー\n");
  13. 		return 0;
  14. 	}
  15.  
  16. for(i=0;i<a;i++){
  17. 	mat[i]=(int *)malloc(sizeof(int)*b);
  18. 	if(mat[i]==NULL){
  19. 		printf("エラー\n");
  20. 		return 0;
  21. 	}
  22. }
  23. k=1;
  24. for(i=0;i<a;i++){
  25. 	for(j=0;j<b;j++){
  26. 		mat[i][j]=k++;
  27. 	}
  28. }
  29.  
  30.     for(i=0;i<a;i++){
  31.         for(j=0;j<b;j++){
  32.             printf("%d ",mat[i][j]);
  33.         }
  34.         printf("\n");
  35.     }
  36.  
  37.     for(i=0;i<a;i++){
  38.     	free(mat[i]);
  39.     	}
  40.     	free(mat);
  41.     return 0;
  42. }
  43.  
Success #stdin #stdout 0s 5284KB
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https://ideone.com/dhrh9W
language:
C (gcc 8.3)
created:
10 days ago
visibility:
public

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