当我在我的复数类中声明 ostream << 重载方法时，它突然崩溃了 在这里
#include<math.h>
#include<ostream>
#include<iostream>
class complex
{
public:
double getRe();
double gerIm();
void setRe(double value);
void setIm(double value);
explicit complex(double=0.0,double=0.0);
static complex fromPolar(double radius,double angle);
complex operator+(complex rhs);
complex operator-(complex rhhs);
complex operator*(complex rhs);
complex operator+(double rhs);
complex operator-(double rhs);
complex operator*(double rhs);
complex conjugate();
double norm();
complex operator/(double rhs);
complex operator/(complex rhs);
friend ostream &operator<<(ostream &out, complex c);
private:
double real;
double img;
};
ostream &operator<<(ostream &out, complex c)
{
out<<c.real<<" ";
out<<c.img<<" ";
return out;
}
complex operator+(double lhs,complex rhs);
complex operator-(double lhs,complex rhs);
complex operator*(double lhs,complex rhs);
complex operator/(double lhs,complex rhs);
complex exp(complex c);
inline double complex::getRe(){return real;}
inline double complex::gerIm(){ return img;}
inline void complex::setRe(double value) { real=value;}
inline void complex::setIm(double value) { img=value;}
inline complex::complex(double re,double im) :real(re),img(im){}
inline complex complex::fromPolar(double radius,double angle){
return complex(radius*cos(angle),radius*sin(angle));
}
inline complex complex::operator+(complex rhs)
{
return complex(this->real+rhs.real,this->img+rhs.img);
}
inline complex complex::operator-(complex rhs)
{
return complex(this->real-rhs.real,this->img-rhs.img);
}
inline complex complex::operator*(complex rhs)
{
return complex(this->real*rhs.real-this->img*rhs.img,this->real*rhs.img+this->img*rhs.real);
}
inline complex complex::operator+(double rhs)
{
return complex(this->real+rhs,this->img);
}
inline complex complex::operator-(double rhs)
{
return complex(this->real-rhs,this->img);
}
inline complex complex::operator*(double rhs)
{
return complex(this->real*rhs,this->img*rhs);
}
inline complex complex::operator/(double rhs)
{
return complex(this->real/rhs,this->img/rhs);
}
inline complex complex::operator/(complex rhs)
{
return (*this)*rhs.conjugate()/rhs.norm();
}
inline double complex::norm()
{
return (this->real*this->real+this->img*this->img);
}
inline complex complex::conjugate()
{
return complex(this->real,-this->img);
}
inline complex operator+(double lhs,complex rhs)
{
return rhs+lhs;
}
inline complex operator-(double lhs,complex rhs)
{
return complex(lhs-rhs.getRe(),rhs.gerIm());
}
inline complex operator*(double lhs,complex rhs)
{
rhs*lhs;
}
inline complex operator/(double lhs,complex rhs)
{
return rhs.conjugate()*lhs/rhs.norm();
}
错误说，这是ostream操作符的重新定义，但我认为我写的正确，所以不明白这是怎么回事，请帮助我
最佳答案
ostream 位于 std 命名空间中，因此在您的类定义中您需要:
friend std::ostream &operator<<(std::ostream &out, complex c);
相应的定义应该是这样的:
std::ostream &operator<<(std::ostream &out, complex c)
{
// ...
另外，您需要在您的 operator* 重载之一中使用 return 语句:
inline complex operator*(double lhs,complex rhs)
{
return rhs*lhs;
}
当您在代码中使用与标准库类模板相同的名称时，您不应使用 using namespace std;。 (即使不是这种情况，您也应该在大多数情况下避免 using namespace std; 并且当然要避免在头文件中使用它。)
关于c++ - ostream << 在类中重载 crush，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/10258121/