C++ Class Definition Define and invoke class member function

#include <cstdio>
#include <cstdlib>
#include <iostream>
using namespace std;

class Employee/*from  ww w .ja  v a2 s.  co m*/
{
  public:
    double addWork(int hours, double grade)
    {
        double weightedSalary;
        weightedSalary = workHour * salary;

        workHour += hours;
        weightedSalary += grade * hours;
        salary = weightedSalary / workHour;

        return salary;
    }

    int  workHour;
    double salary;
};

int main(int nNumberofArgs, char* pszArgs[])
{
    Employee s;
    s.workHour = 3;
    s.salary = 3.0;

    cout << "Before: s = (" << s.workHour << ", " << s. salary  << ")" << endl;

    cout << "Adding 3 hours with a grade of 4.0" << endl;
    s.addWork(3, 4.0); // call the member function

    cout << "After: s = (" << s.workHour << ", " << s. salary  << ")" << endl;

    return 0;
}