编写程序读入两个复数并输出这两个复数的乘积

class Complex
{
public:
Complex(){real=0;imag=0;}//构造函数
Complex(double r){real=r;imag=0;}//转换构造函数 将double型转成Complex类型
Complex(double r,double i){real=r;imag=i;}
//operator double(){return real;}//转换类型函数 将Complex类类型（自定义类型）转换成double型，

(标准类型)
void display();
friend Complex operator*(Complex&,Complex&);

private:
double real;
double imag;
};
Complex operator*(Complex &c1,Complex &c2)
{
return Complex(c1.real*c2.real-c1.imag *c2.imag ,c1.imag *c2.real +c1.imag *c2.real );
}

图呢？？