Suma cifrelor pare ale unui numar

#include <iostream>
using namespace std;

int main()
{
    int n, s=0, c;
    cout<<"n="; cin>>n;
    while(n!=0)
    {
        c=n%10;
        if(c%2==0)
            s=s+c;
        n=n/10;
    }
    cout<<"Suma este "<<s;
    return 0;
}