1 /* File : example.h */
2 #include <math.h>
3 
4 class Complex {
5 private:
6   double rpart, ipart;
7 public:
rpart(r)8   Complex(double r = 0, double i = 0) : rpart(r), ipart(i) { }
Complex(const Complex & c)9   Complex(const Complex &c) : rpart(c.rpart), ipart(c.ipart) { }
10   Complex &operator=(const Complex &c) {
11     rpart = c.rpart;
12     ipart = c.ipart;
13     return *this;
14   }
15   Complex operator+(const Complex &c) const {
16     return Complex(rpart+c.rpart, ipart+c.ipart);
17   }
18   Complex operator-(const Complex &c) const {
19     return Complex(rpart-c.rpart, ipart-c.ipart);
20   }
21   Complex operator*(const Complex &c) const {
22     return Complex(rpart*c.rpart - ipart*c.ipart,
23 		   rpart*c.ipart + c.rpart*ipart);
24   }
25   Complex operator-() const {
26     return Complex(-rpart, -ipart);
27   }
28 
re()29   double re() const { return rpart; }
im()30   double im() const { return ipart; }
31 };
32 
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37