Check number is alphabet or digit using standard function

#include<stdio.h>
#include<conio.h>
#include<ctype.h>
void main()
{
char ch;
clrscr();
printf("enter the charter \n");
scanf("%c",&ch);
if(isalpha(ch)>0)
printf("enter letter is charracter\n");
else
if(isdigit(ch)>0)
printf("enter letter is number\n");
else
printf("enter charter is not alpha numeric\n");
getch();
}

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