Program to reverse a given number.

			#include<stdio.h>
			#include<conio.h>
			void main()
			{
			int n,a,r=0;
			clrscr();
			printf("enter any no to get its reverse: ");
			scanf("%d",&n);
			while(n>=1)
			{
			a=n%10;
			r=r*10+a;
			n=n/10;
			}
			printf("reverse=%d",r);
			getch();
			}
Output:
enter any no to get its reverse: 456
reverse=654