复数类的编写，求全....

#include <iostream>
using namespace std;
class complex
{
      public:
      complex(){cout<<"调用构造函数"<<endl;}
      complex(int r,int i);
      complex(complex&c);
      void set_c(int r,int i);
      int get_c();
     // void add(complex &c1,complex &c2);       //使用普通函数实现两个复数的相加；
     complex operator +(complex &c1);              //使用重载运算符函数“+”实现两个复数的相加；
     private:
      int real;
      int imag;
};
complex::complex(complex&c)
{
     real=c.real;
     imag=c.imag;
     cout<<"调用复制构造函数"<<endl;
     if(imag>0)
     cout<<real<<"+"<<imag<<"i"<<endl;
     else
     if(imag=0)cout<<real<<endl;
     else
     cout<<real<<imag<<"i"<<endl;
     
}
complex::complex(int r,int i)
{
     real=r;imag=i;
     cout<<"调用带参数的构造函数"<<endl;
     if(imag>0)
     cout<<real<<"+"<<imag<<"i"<<endl;
     else
     if(imag=0)cout<<real<<endl;
     else
     cout<<real<<imag<<"i"<<endl;
     
}
void complex:: set_c(int r,int i)
{
     real=r;
     imag=i;
}
int complex::get_c()
{
    if(imag>0)
     cout<<real<<"+"<<imag<<"i"<<endl;
     else
     if(imag=0)cout<<real<<endl;
     else
     cout<<real<<imag<<"i"<<endl;
     return 0;
}
/*void complex::add(complex &c1,complex &c2)
{
     real=c1.real+c2.real;
     imag=c1.imag+c2.imag;
     if(imag>0)
     cout<<real<<"+"<<imag<<"i"<<endl;
     else
     if(imag=0)cout<<real<<endl;
     else
     cout<<real<<imag<<"i"<<endl;
     
} */
complex complex:: operator +(complex &c1)                       //重载运算符函数“+”函数的定义部分，参数只有一个，原因：默认的第一个操作数                                                            
{
    complex c;                                                  //  本对象，因此只有一个操作数；其他的香类似。。
    c.real=real+c1.real;
    c.imag=imag+c1.imag;  
    return c;
}

int main()
{
    complex c1;
    c1.set_c(2,3);
    c1.get_c();
    cout<<endl<<endl;
    complex c2(c1);
    cout<<endl<<endl;
    complex c3(4,6);
    cout<<endl<<endl;
    complex c4;
    cout<<"复数相加后的结果为：";
   // c4.add(c3,c1);                 //普通add（）函数的相加功能；
    cout<<endl<<endl;
    complex c5;
    cout<<"运用重载运算符函数执行的相加功能得出的结果是：";
    c5=c1+c2;                                                             //利用重载运算符函数“+”实现两个复数的相加功能
   
    system("pause");
    return 0;   
}