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#include <iostream>
class complex
{
friend complex operator* (const complex &t,double c);
friend complex operator~ (const complex &t);
friend std::ostream & operator<< (std::ostream & os,const complex &t);
private:
double x;
double y;
public:
complex();
complex(double a,double b);
complex operator+ (const complex &t)const;
complex operator- (const complex &t)const;
complex operator* (const complex &t)const;
friend complex operator* (const complex &t,double c);
/*
notice here
*/
};
complex::complex()
{
x=0;
y=0;
}
complex::complex(double a,double b)
{
x=a;
y=b;
}
complex complex::operator+ (const complex &t)const
{
complex d;
d.x=x+t.x;
d.y=y+t.y;
return d;
}
complex complex::operator- (const complex &t)const
{
complex d;
d.x=x-t.x;
d.y=y-t.y;
return d;
}
/*
notice here
*/
complex complex::operator* (const complex &t)const //明明是member fuction,编译器说这不是member function
{
complex d;
d.x=x*t.x-y*t.y;
d.y=x*t.y+y*t.x;
return d;
}
complex operator* (const complex &t,double c)
{
complex d;
d.x=c*t.x;
d.y=c*t.y;
return d;
}
complex operator~ (const complex &t)
{
complex d;
d.x=t.x;
d.y=-t.y;
return d;
}
std::ostream & operator<<(std::ostream & os,const complex &t)
{
os<<"("<<t.x<<","<<t.y<<"i"<<")";
return os;
}
int main()
{
}
//还是friend 里,访问private成员报错。、
#include <iostream>
class complex
{
friend complex operator* (const complex &t,double c);
friend complex operator~ (const complex &t);
friend std::ostream & operator<< (std::ostream & os,const complex &t);
private:
double x;
double y;
public:
complex();
complex(double a,double b);
complex operator+ (const complex &t)const;
complex operator- (const complex &t)const;
complex operator* (const complex &t)const;
};
complex::complex()
{
x=0;
y=0;
}
complex::complex(double a,double b)
{
x=a;
y=b;
}
complex complex::operator+ (const complex &t)const
{
complex d;
d.x=x+t.x;
d.y=y+t.y;
return d;
}
complex complex::operator- (const complex &t)const
{
complex d;
d.x=x-t.x;
d.y=y-t.y;
return d;
}
complex operator* (const complex &t)const //明明是member fuction,编译器说这不是member function
{
complex d;
d.x=x*t.x-y*t.y;
d.y=x*t.y+y*t.x;
return d;
}
complex operator* (const complex &t,double c)
{
complex d;
d.x=c*t.x;
d.y=c*t.y;
return d;
}
complex operator~ (const complex &t)
{
complex d;
d.x=t.x;
d.y=-t.y;
return d;
}
std::ostream & operator<<(std::ostream & os,const complex &t)
{
os<<"("<<t.x<<","<<t.y<<"i"<<")";
return os;
}
int main()
{
}
#include <iostream>
class complex
{
friend complex operator* (const complex &t,double c);
friend complex operator~ (const complex &t);
friend std::ostream & operator<< (std::ostream & os,const complex &t);
private:
double x;
double y;
public:
complex();
complex(double a,double b);
complex operator+ (const complex &t)const;
complex operator- (const complex &t)const;
complex operator* (const complex &t)const;
};
complex::complex()
{
x=0;
y=0;
}
complex::complex(double a,double b)
{
x=a;
y=b;
}
complex complex::operator+ (const complex &t)const
{
complex d;
d.x=x+t.x;
d.y=y+t.y;
return d;
}
complex complex::operator- (const complex &t)const
{
complex d;
d.x=x-t.x;
d.y=y-t.y;
return d;
}
complex operator* (const complex &s, const complex &t)///
{
complex d;
d.x=s.x*t.x-s.y*t.y;
d.y=s.x*t.y+s.y*t.x;
return d;
}
complex operator* (const complex &t,double c)
{
complex d;
d.x=c*t.x;
d.y=c*t.y;
return d;
}
complex operator~ (const complex &t)
{
complex d;
d.x=t.x;
d.y=-t.y;
return d;
}
std::ostream & operator<<(std::ostream & os,const complex &t)
{
os<<"("<<t.x<<","<<t.y<<"i"<<")";
return os;
}
int main()
{
}