[問題] 只能一個參數？
小弟有各 CLASS 但是在重載<<時
一直有個錯誤
std::ostream如下& Complex::operator<<(std::ostream&, Complex)’
must take exactly one argument
可是一般重載<<時 不都是設一個OSTREAM嗎？
還是這是g++的限制呢？
謝謝大家指教
#include<iostream>
class Complex
{
private:
double re, im;
public:
Complex(double r, double i): re(r), im(i) {}
Complex operator+(const Complex&);
std::ostream& operator<<(std::ostream& out, const Complex x);
};
Complex Complex::operator+(const Complex& a)
{
Complex c(a.re+re,a.im+im);
return c;
}
std::ostream& Complex::operator<<(std::ostream& out, const Complex x)
{
out << x.re << " " << x.im;
return out;
}
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