演算子に+、--、+=、-=...

 1 // 

 2 // 

 3 #include<iostream>

 4 using namespace std;

 5 class Complex

 6 {

 7     public:

 8     Complex(double r ,double a);

 9     Complex(){};

10     Complex operator + (const Complex &aa) const ;

11     Complex operator - (const Complex &bb) const ;

12     void fun();

13     private:

14     double real;

15     double imag;

16 };

17  Complex::Complex(double r=0.0 ,double a=0.0):real(r),imag(a){};

18 Complex Complex::operator +(const Complex &aa) const

19 {

20     Complex ans(real+aa.real,imag+aa.imag);

21     //ans.real=real-aa.real;

22     //ans.imag=imag-aa.imag;

23     return ans;

24 };

25 void Complex::fun()

26 {

27     cout<<this->real<<" "<<this->imag<<endl;

28 }

29 Complex Complex::operator -(const Complex &bb) const

30 {

31     return Complex(real-bb.real,imag-bb.imag);

32 }

33 int main()

34 {

35     Complex aa(5,6),bb(7,3);

36     aa=aa+bb;

37     aa.fun();

38     return 0;

39 }