?? 18_1.cpp
字號:
#include <iostream.h>
class Complex{
public:
Complex(double r=0, double v=0):real(r),virt(v){}
friend Complex operator+(Complex a, Complex b);
friend ostream& operator<<(ostream& out, Complex& a);
private:
double real;
double virt;
};
ostream& operator<<(ostream& out, Complex& a){ return out <<a.real <<"+" <<a.virt <<"i\n"; }
Complex operator+(Complex a, Complex b)
{
return Complex(a.real+b.real, a.virt+b.virt);
}
void main()
{
Complex a(2,5), b(7,8), c(0,0);
c = a + b;
cout <<c;
c = 4.1 + a;
cout <<c;
c = b + 5.6;
cout <<c;
}
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