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

class Complex {
public:
    Complex(double real1 = 0, double imaginary1= 0);
    Complex(Complex &p);
    void add(Complex t);
    void show();
    double mod();
private:
    double real, imaginary;
};

Complex::Complex(
 
double real1, double imaginary1) {
    real= real1;
    imaginary= imaginary1;
}

Complex::Complex(Complex &p)
{    real=p.real;
     imaginary=p.imaginary;
}

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

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

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

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

總結：運用類的定義，這個框架運用還是不太熟悉。

課堂小練習: 設計、定義並實現Complex類