Write a program to reverse, count, and add digits of a number

Program shows to reverse, count, and add digits of a number. The reverse of a given digit, number of digits in a given number and, addition of all digits in a given number can displayed by this program. 

#include<stdio.h>
#include<conio.h>
        void main()
        {
            int sum=0,num,rev=0,r,count=0;
            clrscr();
            printf("/n Enter any number:");
            scanf("%d",&num);
            while(num!=0)
            {
                r=num%10;
                rev=rev*10+r;
                sum=sum+r;
                num=num/10;
                count++;

            }
            printf("/n Reverse of a number %d",rev);
            printf("/n Count of a number %d",count);
            printf("/n Sum of digits %d",sum);
        }