การบ้านข้อ11

#include<stdio.h>
#include<conio.h>
main()
{
      int i,b;
      char a ;
      printf("char=");
      scanf("%c",&a);
      printf("number=");
      scanf("%d",&b);
     if(b>=4 && b<=9)
     {
             for(i=1;i<=b*b;i++)
             {
             printf("%c",a);
                                if (i%b==0)
                                {
                                printf("\n");
                                }
             }
     }
     else
     {
             printf("it can't show");
    
      
     }
     
      getch();
}