复数的C++代码，C++面向对象开发的基础代码，简单易懂。(class complex
{
public:
　complex (double r = 0, double i = 0): re (r), im (i) { }
　complex& operator += (const complex&);
　complex& operator -= (const complex&);
　complex& operator *= (const complex&);
　complex& operator /= (const complex&);
　double real () const { return re; }
　double imag () const { return im; }
private:
　double re, im;

　friend complex& __doapl (complex *, const complex&);
　friend complex& __doami (complex *, const complex&);
　friend complex& __doaml (complex *, const complex&);
};)