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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=1;
  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)
  14. {printf("ERROR\n");
  15. return 0;}
  16.  
  17. for(j=0;j<a;j++)
  18. {mat[j]=(int*)malloc(sizeof(int)*b);
  19. if(mat==NULL)
  20. {printf("ERROR\n");
  21. return 0;}}
  22.  
  23. for(i=0;i<a;i++)
  24. {for(j=0;j<b;j++)
  25. {mat[i][j]=k++;}
  26. }   
  27.  
  28. for(i=0;i<a;i++)
  29. {for(j=0;j<b;j++)
  30. {printf("%d ",mat[i][j]);}
  31. printf("\n");}
  32.  
  33. for(i=0;i<a;i++)
  34. {free(mat[i]);}
  35. free(mat);
  36.  
  37.     return 0;
  38. }
  39.  
Success #stdin #stdout 0.01s 5320KB
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https://ideone.com/IT5w3l
language:
C (gcc 8.3)
created:
4 days ago
visibility:
public

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