摘要：
此类主要用于颜色操作。详细的操作原理如下：类声明：classRGBColor｛public:RGBColoer（）；~RGBColo（）；RGBColoor；RGBClor；RGBCcolor；RGB color operator+const；RGC color&operator+=；RGB lor operator*=；RGC lor运算符/const；rgB color&运算符/=；RGG color运算符*const；RGB color&算子=；booloperator==const；boost运算符！
这个类主要是颜色操作，操作详细原理如下图：
类声明：
class RGBColor {
public:
RGBColor();
~RGBColor();
RGBColor(ldouble a);
RGBColor(ldouble red, ldouble green, ldouble blue);
RGBColor(const RGBColor& c);
RGBColor operator+(const RGBColor& c) const;
RGBColor& operator+=(const RGBColor& c);
RGBColor operator*(const ldouble a) const;
RGBColor& operator*=(const ldouble a);
RGBColor operator/(const ldouble f) const;
RGBColor& operator/=(const ldouble f);
RGBColor operator*(const RGBColor& c) const;
RGBColor& operator=(const RGBColor& c);
bool operator==(const RGBColor& c) const;
bool operator!=(const RGBColor& c) const;
RGBColor powc(ldouble p) const;
ldouble average() const;
friend std::ostream& operator<<(std::ostream& os, const RGBColor& c);
friend std::istream& operator>>(std::istream& is, RGBColor& c);
ldouble r, g, b;
};