课堂练习Complex类

Complex类

 1 #include<iostream>
 2 #include<cmath>
 3 using namespace std;
 4 class Complex {
 5 public:
 6     Complex(double nreal = 0.0, double nimaginary = 0.0);
 7     Complex(Complex &c);
 8     void add(Complex com);
 9     void show();
10     double    mod();
11 private:
12     double real;
13     double imaginary;
14 
15 };
16 Complex::Complex(double nreal, double nimaginary) :real(nreal), imaginary(nimaginary) {};
17 Complex::Complex(Complex &c) {
18     real = c.real;
19     imaginary = c.imaginary;
20 }
21 void Complex::add(Complex com) {
22     real += com.real;
23     imaginary += com.imaginary;
24 }
25 void Complex::show() {
26     if (imaginary == 0)
27         cout << real << endl;
28     else if (imaginary > 0)
29         cout << real << "+" << imaginary << "i" << endl;
30     else
31         cout << real << imaginary << "i" << endl;
32 }
33 double Complex::mod() {
34     return sqrt(real*real + imaginary * imaginary);
35 }
36 int main() {
37     Complex c1(3,5);
38     Complex c2=4.5;
39     Complex c3(c1);
40     c1.add(c2);
41     c1.show();
42     cout << c1.mod();
43     return 0;
44 }