C++ program to find Sum of digits of a number Entered by User

#include <iostream>
using namespace std;

int main(void) {
int sum=0,count=0,i,a,rem,num;

cout<<"Enter a number to sum its digits : ";
cin>>num;
a=num;
for(i=0;num!=0;i++)
   {
      rem=num%10;
      sum=sum+rem;
      num=num/10;
      count++;

   }
   cout<<"\nThe sum of "<<count<<" digited number "<<a<<" is = "<<sum<<endl;
return 0;
}