课堂小练习: 设计、定义并实现Complex类

#include <iostream>
#include <cmath>
using namespace std;

class Complex
{  public:
          Complex(double x,double y);
          Complex(double z);
          Complex(Complex &p);
          void add(Complex t);
          void show();
          double mod();
    private:
        double real,imaginary;
};

Complex::Complex(double x,double y):real(x),imaginary(y)
{
}

Complex::Complex(double z):real(z)
{
}

Complex::Complex(Complex &p):real(p.real),imaginary(p.imaginary)
{
}

void Complex::add(Complex t)
{    real=real+t.real;
    imaginary=imaginary+t.imaginary;
}

void Complex::show()
{     cout<<real<<"+"<<imaginary<<"i"<<endl; 
}

double Complex::mod()
{    return sqrt(real*real+imaginary*imaginary);
}

int main()
{     double m;
    Complex c1(3,5);
    Complex c2(4.5);
    Complex c3(c1);
    c1.add(c2);
    c1.show();
    m=c1.mod();
    cout<<m;
    return 0;
}