写一个程序定义抽象基类Cshape。帮忙做道程序题。谢谢

#include <iostream>

using namespace stdclass Cshape

{

public:

virtual double GetArea() = 0

}class Ccircle:public Cshape

{

public:

Ccircle(double r):m_r(r) {}

virtual double GetArea()

{

return (3.14 *m_r * m_r)

}

private:

double m_r

}class Csquare:public Cshape

{

public:

Csquare(double a):m_a(a) {}

virtual double GetArea()

{

return (m_a * m_a)

}

private:

double m_a

}class Crectangle:public Cshape

{

public:

Crectangle(double a, double b):m_a(a), m_b(b) {}

virtual double GetArea()

{

return (m_a * m_b)

}

private:

double m_a

double m_b

}class Ctrapeziod:public Cshape

{

public:

Ctrapeziod(double a, double b, double h):m_a(a), m_b(b), m_h(h) {}

virtual double GetArea()

{

return ((m_a + m_b) * m_h / 2)

}

private:

double m_a

double m_b

double m_h

}class Ctriangle:public Cshape

{

public:

Ctriangle(double a, double h):m_a(a), m_h(h) {}

virtual double GetArea()

{

return (m_a * m_h / 2)

}

private:

double m_h

double m_a

}int main()

{

Cshape* pShape[5]

pShape[0] = new Ccircle(5)

pShape[1] = new Ctriangle(3.4, 8.6)

pShape[2] = new Csquare(4.6)

pShape[3] = new Ctrapeziod(4.5, 7.3, 4)

pShape[4] = new Crectangle(5, 6)

cout<<"圆形面积:"<<pShape[0]->GetArea()<<endl

cout<<"三角形面积:"<<pShape[1]->GetArea()<<endl

cout<<"正方形面积:"<<pShape[2]->GetArea()<<endl

cout<<"梯形面积:"<<pShape[3]->GetArea()<<endl

cout<<"长方形面积:"<<pShape[4]->GetArea()<<endl

double sum = 0

cout<<"它们面积总和为:"

for (int i=0i!=5++i)

{

sum += pShape[i]->GetArea()

delete pShape[i]

pShape[i] = NULL

}

cout<<sum<<endl

return 0

}

不是C shape

是C#(C Sharp)是微软(Microsoft)为.NET Framework量身订做的程序语言，C#拥有C/C++的强大功能以及Visual Basic简易使用的特性，是第一个组件导向(Component-oriented)的程序语言，和C++与Java一样亦为对象导向(object-oriented)程序语言。

http://baike.baidu.com/view/107979.htm?fr=ala0_1

#include <iostream>

using namespace std

class CShape

{

public:

CShape(void)

{

}

~CShape(void)

{

}

virtual void area(void) = 0

virtual void cir(void) = 0

}

class CRectangle:public CShape

{

public:

CRectangle(int xx = 0,int yy = 0)

{

x = xx

y = yy

}

void area()

{

cout<<x*y<<endl

}

void cir()

{

cout<<2*(x+y)<<endl

}

private:

int x,y

}

class CCircle:public CShape

{

public:

CCircle(int rr = 0)

{

r = rr

}

void area()

{

cout<<2*3.14*r<<endl

}

void cir()

{

cout<<3.14*r*r<<endl

}

private:

int r

}

int main()

{

CShape* a = new CRectangle(1,2)

a->area()

a->cir()

CShape* b = new CCircle(3)

b->area()

b->cir()

system("pause")

return 0

}

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