class Rectangle
{
private:
double Length;
double Width;
public:
Rectangle(){Length=1;Width=1;}
Rectangle(double len, double w){Length=len;Width=w;}
double Perimeter(){return 2*(Length+Width);}
double Area(){return (Length*Width);}
void show(char *buf){sprintf(buf,"%矩形长=%f,宽=%f", Length, Width);}
};//读写矩形的长宽的方法你就自己写吧，很简单的int main(){ Rectangle test1(4,7); Rectangle test1(2,8);}
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