#include "stdafx.h"     //这里提示出错了
#include <iostream>
using namespace std;
class real
{
public:
    real(double value=0);
    real operator -()const;
    real operator ++();
private:
    double value;
};
real::real(double value)
{
    this->value=value;
}
real real::operator -()const
{
    return real(-value);
}
real real::operator ++()
{
    value++;
    return real(value);
}
void main()
{
    real r1(12.3);
    cout<<r1<<endl;
    cout<<++r1<<endl;
    cout<<r1<<endl;
    cout<<-r1<<endl;
}



我是用vc6.0的，应该怎样改正，请个位帮帮忙！