程序代码：

#include <iostream.h>
class com
{
public:
//运算符重载
    friend istream & operator >> (istream &,com &);
        friend ostream & operator << (ostream &,com &);
    friend com & operator + (com &,com &);
private:
    int real,image;
};
ostream & operator << (ostream & output,com &c)
{
    output<<"("<<c.real<<"+"<<c.image<<"i)";
    return output;
}
istream & operator >> (istream & input,com & c)
{
    input>>c.real>>c.image;
    return input;
}
com& operator + (com &a,com &b)
{
com c;
c.real=a.real+b.real;
c.image=a.image+b.image;
return c;
}
int main()
{
    com a,b;
    cout<<"input a=";
    cin>>a;
    cout<<"input b=";
    cin>>b;
    cout<<"a="<<a<<endl;
    cout<<"b="<<b<<endl;
    cout<<"a+b="<<a+b<<endl;
    return 0;
}