看看这个小小的错误在哪里

[温暖阳光236]

#include <iostream>
using namespace std;

class Complex
{
private:
double rpart, ipart;
public:
Complex(double r = 0.0, double i = 0.0)
{
rpart = r;
ipart = i;
}
friend ostream& operator << (ostream&, Complex&);
};

ostream& operator << (ostream& os, Complex& c)
{
os << "(" << c.rpart << "," << c.ipart << ")" << endl;
return os;
}

int main()
{
Complex a(5, 4), b(1.1, 2.2);
cout << a << b;
return 0;
}
以上错在哪里？初学

[ArmStronger]

没错，如果你用vc6的话，有缘函数必须在类里定义，这是vc6的bug

[tan870426]

VS2008没错啊....报什么错？

[wuyu637]

运行没有错。。
vc2005

[太乙]

#include <iostream>
using namespace std;

class Complex
{
private:
double rpart, ipart;
public:
Complex(double r = 0.0, double i = 0.0)
{
rpart = r;
ipart = i;
}
friend ostream& operator < < (ostream&, Complex&)
{
os < < "(" < < c.rpart < < "," < < c.ipart < < ")" < < endl;
return os;
}
};




int main()
{
Complex a(5, 4), b(1.1, 2.2);
cout < < a < < b;
return 0;
} 

[andson1111]

没错，vc6也没错啊、莫非我们水平太低。汗！

[lovesi3344]

坐等大牛解决
我记得我们老师当时说过用vc6的时候在类之前要加两行友元声明和类什么来着
现在已经模糊了 当然 如果不是用VC6编译就没有这种问题

[pengzhixi]

如果是vc6.0的话，友元函数必须前置声明。