大哥大姐帮助小弟我啊，这个程序纠结啊，在线坐等，先谢过了。。
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li461277332
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 | 大哥大姐一定要帮帮啊，，，重谢！！麻烦了 一，定义表示形状的基类CShape，包括以下成员： 1)double Perimeter(void),用于求周长，纯虚函数，公有成员 2)double Area(void) 用于求面积，纯虚函数，公有成员 3)char*m _objName,表示对象名称，保护数成员 4)void ShowName(void) 用于显示对象名称，公有成员，若m_objName为空，则显示"No Name"否则显示其名称 5)公有成员CShape(void),作用是将m_objName设置为NULL 6)公有成员CShape(char*objname),作用是将objname的内容复制到m_objName中。 7)无析构函数 二，定义矩形类CRectangle和三角形类CTriangle，这两个类均以public方式派生自CShape类，根据这两个类的具体用途添加相关的数据成员和函数成员，实现其所有成员函数和继函自基类的纯虚函数。 三，主函数的功能: 1)定义基类指针pBase， 2)显示一个菜单，包括矩形，三角形，退出三个选项，选择前两项时，创建相应对象，令pBase指向该对象，并执行后续功能，选择退出时，直接退出程序。 3)显示pBase所指向对象的面积和周长。 4)说明:上述3个对象和主函数均放在同一个CPP文件中，文件名为Shape.cpp | |
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灯火互联
5楼
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| 给你找到一个 #include<iostream> #include<cmath> #include<iomanip> #ifndef CSHAPE_H #define CSHAPE_h usingnamespace std; constfloat PI=3.1; class CShape//CShape抽象类定义 { public: virtualfloat length()//图形长度 { return 0.0; } virtualfloat area()//图形面积 { return 0.0; } virtualfloat valum()//图形体积 { return 0.0; } virtualfloat zc()//图形周长 { return 0.0; } virtualvoid draw()=0;//描绘图形 }; class CPoint:virtualpublic CShape//CPoint类定义 { protected: float x,y; public: CPoint(float a,float b) { x=a; y=b; } void setpoint(float a,float b) { x=a; y=b; } void draw() { cout<<"点的坐标为："<<"("<<x<<","<<y<<")"<<endl; } }; class CLine:virtualpublic CShape//线类定义 { protected: float x,y,z,k; public: CLine(float a,float b,float c,float d) { x=a; y=b; z=c; k=d; } void setline(float a,float b,float c,float d) { x=a; y=b; z=c; k=d; } float length() { return(sqrt((x-z)*(z-z)+(y-k)*(y-k))); } void draw() { cout<<"两坐标分别为："<<"("<<x<<","<<y<<")"<<"，（"<<z<<","<<k<<")"<<endl; } }; class CRectangle:virtualpublic CShape//长方形类定义 { protected: float length,width; public: CRectangle(float l,float w) { length=l; width=w; } void setrectangle(float l,float w) { length=l; width=w; } float area() { return(length*width); } float zc() { return(2*(length+width)); } void draw() { cout<<"长方形的长为："<<length<<setw(10)<<"宽为:"<<width<<endl; } }; class CCircle:virtualpublic CShape//圆类定义 { protected: float radius; public: CCircle(float r) { radius=r; } void setcircle(float r) { radius=r; } float area() { return(PI*radius*radius); } float zc() { return(2*PI*radius); } void draw() { cout<<"圆的半径为："<<radius<<endl; } }; class CCylinder:virtualpublic CShape//圆柱类定义 { protected: float heigth,radius; public: CCylinder(float r,float h) { heigth=h; radius=r; } void setcylinder(float r,float h) { heigth=h; radius=r; } float area() { return(PI*radius*radius+2*PI*radius); } float valum() { return(PI*radius*radius*heigth); } void draw() { cout<<"圆柱高度为："<<heigth<<setw(10)<<"半径为："<<radius<<endl; } }; class CCone:virtualpublic CShape//定义一个圆锥类 { protected: float mx,radius; public: CCone(float a,float b) { mx=a; radius=b; } void setcone(float a,float b) { mx=a; radius=b; } float valum() { return(PI*radius*radius*sqrt(mx*mx-radius*radius)); } void draw() { cout<<"母线长为："<<mx<<setw(10)<<"半径长为："<<radius<<endl; } }; class CTriangle:virtualpublic CShape//三角形类定义 { protected: float x,y,z; public: CTriangle(float a,float b,float c) { x=a;y=b;z=c; } void settriangle(float a,float b,float c) { x=a;y=b;z=c; } float zc() { return(x+y+z); } float area() { float t=(x+y+z)/2; return(sqrt((t-x)*(t-y)*(t-z))); } void draw() { cout<<"三角形三边长分别为："<<x<<","<<y<<","<<z<<endl; } }; class CPolygon:virtualpublic CShape//多边形类定义 { protected: float x; int y; public: CPolygon(float a,int b) { x=a; y=b; } void setpolygon(float a,int b) { x=a; y=b; } float area() { return(sqrt(3.0)*x*x*y/4); } float zc() { return(x*y); } void draw() { cout<<"多边形的一边长为："<<x<<setw(10)<<"边数为："<<y<<endl; } }; #endif #include"CShape.h" #include<iostream> #include<iomanip> usingnamespace std; void main() { char d='y'; int i(0); cout<<"欢迎进入本系统！"; cout<<"请选择服务："<<endl; cout<<" 1.点的计算。"<<endl; cout<<" 2.线的计算。"<<endl; cout<<" 3.圆的计算。"<<endl; cout<<" 4.圆柱的计算。"<<endl; cout<<" 5.圆锥的计算。"<<endl; cout<<" 6.长方形的计算。"<<endl; cout<<" 7.多边形的计算。"<<endl; cout<<" 8.三角形的计算。"<<endl; cout<<" 9.退出。"<<endl; while(d=='Y'||d=='y') { cout<<"请输入你的选择："<<endl; cin>>i; if(i==1) { CShape *pshape; CPoint point(2.0,3.0); float a,b; cout<<"请输入点的坐标："; cin>>a>>b; point.setpoint(a,b); pshape=&point; pshape->draw(); } elseif(i==2) { CShape *pshape; CLine line(1.0,2.0,3.0,4.0); float a,b,c,d; cout<<"请依次输入两端点的坐标："; cin>>a>>b>>c>>d; line.setline(a,b,c,d); pshape=&line; pshape->draw(); cout<<"线的长度为："<<pshape->length()<<endl; } elseif(i==3) { CShape *pshape; CCircle circle(2.0); float a; cout<<"请输入圆的半径："; cin>>a; circle.setcircle(a); pshape=&circle; pshape->draw(); cout<<"圆的面积为;"<<pshape->area()<<setw(10)<<"圆的周长为;"<<pshape->zc()<<endl; } elseif(i==4) { CShape *pshape; CCylinder yz(2.0,3.0); float a,b; cout<<"请输入圆柱的底面半径和高："; cin>>a>>b; yz.setcylinder(a,b); pshape=&yz; pshape->draw(); cout<<"圆柱的面积为："<<pshape->area()<<setw(10)<<"圆柱的体积为："<<pshape->valum()<<endl; } elseif(i==5) { CShape *pshape; CCone cone(5.0,4.0); float a,b; cout<<"请输入母线长和底面半径："; cin>>a>>b; cone.setcone(a,b); pshape=&cone; pshape->draw(); cout<<"圆锥的体积为："<<pshape->valum()<<endl; } elseif(i==6) { CShape *pshape; CRectangle rectangle(3.0,2.0); float a,b; cout<<"请输入长方形的长和宽："; cin>>a>>b; rectangle.setrectangle(a,b); pshape=&rectangle; pshape->draw(); cout<<"长方形的面积为："<<pshape->area()<<setw(10)<<"长方形的周长为："<<pshape->zc()<<endl; } elseif(i==7) { CShape *pshape; CPolygon polygon(2.0,4); float a; int b; cout<<"请输入多边形的边长和边数："; cin>>a>>b; polygon.setpolygon(a,b); pshape=&polygon; pshape->draw(); cout<<"多边形的面积为："<<pshape->area()<<setw(10)<<"周长为："<<pshape->zc()<<endl; } elseif(i==8) { CShape *pshape; CTriangle triangle(3.0,4.0,5.0); float a,b,c; cout<<"请输入三角形三边长："; cin>>a>>b>>c; triangle.settriangle(a,b,c); pshape=▵ pshape->draw(); cout<<"三角形的周长为："<<pshape->zc()<<"面积为："<<pshape->area()<<endl; } elseif(i==9) { return; } else { cout<<"输入错误，请重新输入！"; } cout<<"是否继续其他操作（Y/N）?"<<endl; cin>>d; } } | |
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