Lab5_2

#include "stdafx.h"
#include "iostream"
#include "iomanip"
#include "math.h"

using namespace std;

int _tmain(int argc, _TCHAR* argv[])
{
        double n,i,k,l;
        k=l=0;
        cout<<"Enter n=";
        cin>>n;
        while ((n>=4) && (l<3))
        {
                i=n/4;
                if (i-int(i)==0) {k=k+n; l++; n=n-4;}
                else n--;
        }
        cout<<k<<endl;
        system("pause");
        return 0;
}