计算圆的周长和面积C++.doc

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1、#include#includeusingnamespacestd;constdoublePI=3.141593;classCircle{public:Circle(){R=1;n=counter++;}Circle(intr){R=r;n=counter++;}~Circle();Circle(constCircle&obj){R=obj.R;n=counter++;}voidSetR(intr);intGetR();doubleGetGirth();doubleGet

2、Area();staticintGetCounter();intGetN();voidPrint();friendvoidCompareS(Circle&c1,Circle&c2);private:intR;intn;staticintcounter;};intCircle::counter=0;Circle::~Circle(){cout<<"ÕýÔÚÎö¹¹±àºÅΪ"<

3、e::GetR(){returnR;}doubleCircle::GetGirth(){return2*PI*R;}doubleCircle::GetArea(){returnPI*R*R;}intCircle::GetCounter(){returncounter;}intCircle::GetN(){returnn;}voidCircle::Print(){cout<<"±àºÅΪ"<

4、:GetR()<c2.GetArea())cout<<"±àºÅΪ"<

5、ª"<

6、pareS(c2,c3);//¢Ú¼ÆËãÈý¸ö¶ÔÏóµÄÖܳ¤¡¢Ãæ»ý²¢Êä³ö¡£c1.Print();c2.Print();c3.Print();//¢Û¶¨ÒåÒ»¸öÖ¸Õë¶ÔÏó£¬Ê¹ÓÃnew¶¯Ì¬ÉêÇë¿Õ¼ä£¬¼ÆËãÆäÖܳ¤¡¢Ãæ»ý²¢Êä³ö£¬ÓÃdeleteÏû³ý¡£Circle*c4=newCircle(3);c4->Print();deletec4;//¢Ü¶¨ÒåÒ»¸öÆÕͨ¶ÔÏóÊý×飬°üº¬5¸öÔªËØ£¬·Ö±ð¼ÆËãÆä

7、Öܳ¤¡¢Ãæ»ý²¢Êä³ö¡£Circleshuzu[5];inti;for(i=0;i<5;i++){shuzu[i].SetR(rand()%10+1);shuzu[i].Print();}//¢Ý¶¨ÒåÒ»¸öÖ¸Õë¶ÔÏóÊý×飬°üº¬5¸öÔªËØ£¬·Ö±ð¼ÆËãÆäÖܳ¤¡¢Ãæ»ý²¢Êä³ö¡£Circle*p=newCircle[5];for(i=0;i<5;i++){p[i].SetR(rand()%10+1);p[i].Print();}delete[]p;ret

8、urn0;}