Programs in C language

#include<stdio.h>

void main()
{
    int n, r, rev=1;
    clrscr();
    printf("Enter a number:");
    scanf("%d",&n);
    
    while(n>0)
    {
    	r = n%10;
        rev=(rev*10)+r;
        n = n/10;
    }
    
    printf("Reverse number is %d",rev);
    getch();
}