课堂练习Complex类

Complex类

 #include<iostream>
 #include<cmath>
 using namespace std;
 class Complex {
 public:
     Complex(double nreal = 0.0, double nimaginary = 0.0);
     Complex(Complex &c);
     void add(Complex com);
     void show();
     double    mod();
 private:
     double real;
     double imaginary;

 };
 Complex::Complex(double nreal, double nimaginary) :real(nreal), imaginary(nimaginary) {};
 Complex::Complex(Complex &c) {
     real = c.real;
     imaginary = c.imaginary;
 }
 void Complex::add(Complex com) {
     real += com.real;
     imaginary += com.imaginary;
 }
 void Complex::show() {
     if (imaginary == )
         cout << real << endl;
     else if (imaginary > )
         cout << real << "+" << imaginary << "i" << endl;
     else
         cout << real << imaginary << "i" << endl;
 }
 double Complex::mod() {
     return sqrt(real*real + imaginary * imaginary);
 }
 int main() {
     Complex c1(,);
     Complex c2=4.5;
     Complex c3(c1);
     c1.add(c2);
     c1.show();
     cout << c1.mod();
     return ;
 }