1 //例8.1
2 #include <iostream>
3 using namespace std;
4 class Complex
5 {
6 public:
7 Complex(double r = 0.0,double i = 0.0):real(r),image(i){}
8 Complex operator+(const Complex &c2) const;
9 Complex operator-(const Complex &c2) const;
10 void display() const;
11 private:
12 double real;
13 double image;
14 };
15 Complex Complex::operator+(const Complex &c2) const
16 {
17 return Complex(real+c2.real,image+c2.image);
18 }
19 Complex Complex::operator-(const Complex &c2) const
20 {
21 return Complex(real-c2.real,image-c2.image);
22 }
23 void Complex::display()const
24 {
25 cout<<"("<<real<<","<<image<<")"<<endl;
26 }
27 int main()
28 {
29 Complex c1(5,4),c2(2,10),c3;
30 cout<<"c1 = ";c1.display();
31 cout<<"c2 = ";c2.display();
32 c3 = c1 -c2;
33 cout<<"c3 = c1 - c2 = ";c3.display();
34 c3 = c1 + c2;
35 cout<<"c3 = c1 + c2 =";c3.display();
36 return 0;
37 }
