C++抽象类（看代码哪里出错了、谢谢！）
#include "stdafx.h"
#include <iostream.h>
class Shape
{ public:
virtual double Area( int ) const=0;
virtual int Get_N(void) { return 0;}
virtual ~Shape() { cout<<"desturctor of Shape is called!\n";}
};
//------------------------
class Polygon:public Shape
{
public:
virtual double Area(int) const=0;
};
//--------------------------
class Triangle:public Polygon
{
public:
Triangle(int n);
double Area(int i) const {return pB[i]*pH[i]*0.5;}
int Get_N(void) {return nT;}
~Triangle()
{
delete []pB;
delete []pH;
cout<<"destructor of Trangle is called!\n";
}
private:
double *pB,*pH;
int nT;
};
//--------------------------
Triangle::Triangle(int n)
{ int i;
nT=n;
pB=new double[n];
pH=new double[n];
cout<<"input bottom and high.\n";
for (i=0;i<n;i++)
cin>>pB[i]>>pH[i];
}
class Rectangle:public Polygon
{ public:
Rectangle( int n);
double Area( int i) const { return pH[i]*pW[i];}
int Get_N(void ) { return nR;}
~Rectangle()
{ delete []pW;
delete []pH;
cout<<"destructor of Rectangle is called !\n";
}
private:
double *pW,*pH;
int nR;
};
//-------------------------
Rectangle::Rectangle(int n)
{ int i;
nR=n;
pH=new double[n];
pW=new double[n];
cout<<"input length and wide.\n";
for (i=0;i<n;i++)
cin>>pH[i]>>pW[i];
}
class Circle:public Shape
{ public:
Circle::Cricle(int n);
double Area(int i) const {return pC[i]*pC[i]*3.14;}
int Get_N(void ) {return nC;}
~Circle()
{ delete[] pC;
cout<<"destructor of Circle is called!\n";
}
private:
double *pC;
int nC;
};
//-----------------------------------
Circle::Circle( int n)
{ int i;
nC=n;
pC=new double[n];
cout<<"input radious .\n";
for (i=0;i<n;i++)
cin>>pC[i];
}
class Application
{ public:
double Compute(Shape *s[],int n) const ;
};
//------------------------------------------
double Application::Compute(Shape *s[],int n) const
{ double sum=0;
int n1=0;
for (int i=0;i<n;i++)
{ n1=s[i]->Get_N();
for(int k=0;k=n1;k++)
{
sum+=s[i]->Area(k);
cout<<"sum="<<sum<<"\tarea="<<s[i]->Area(k)<<endl;
}
}
return sum;
}
class Myprogarm:public Application
{ public:
Myprogarm();
~Myprogarm();
int Run();
private:
Shape **s;
};
//-------------------------------------------
Myprogarm::Myprogarm()
{ s=new Shape *[3];
int num=0;
cout<<"input the number of triangles.\n";
cin>>num;
s[0]=new Triangle(num);
cout<<"input the number of rectangles.\n";
cin>>num;
s[1]=new Rectangle(num);
cout<<" input the number of circles .\n";
cin>>num;
s[2]=new Circle(num);
}
int Myprogram::Run()
{ double sum=Compute(s,3);
cout<<sum<<endl;
return 0;
}
//--------------------------------------------
Myprogram::~Myprogram()
{ int i;
for(i=0;i<3;i++)
delete s[i];
delete []s;
}
//------------------------------------------
void main()
{
return Myprogram().Run();
}
//---------------------------------------------
[解决办法]
楼主啊，你不要搞这么多的低级错误啊。
#include "stdafx.h"#include <iostream.h>class Shape { public: virtual double Area( int ) const=0; virtual int Get_N(void) { return 0;} virtual ~Shape() { cout<<"desturctor of Shape is called!\n";}};//------------------------class Polygon:public Shape{public: virtual double Area(int) const=0;};//--------------------------class Triangle:public Polygon{ public: Triangle(int n); double Area(int i) const {return pB[i]*pH[i]*0.5;} int Get_N(void) {return nT;} ~Triangle() { delete []pB; delete []pH; cout<<"destructor of Trangle is called!\n"; }private: double *pB,*pH; int nT;};//--------------------------Triangle::Triangle(int n){ int i; nT=n; pB=new double[n]; pH=new double[n]; cout<<"input bottom and high.\n"; for (i=0;i<n;i++) cin>>pB[i]>>pH[i];}class Rectangle:public Polygon{ public: Rectangle( int n); double Area( int i) const { return pH[i]*pW[i];} int Get_N(void ) { return nR;} ~Rectangle() { delete []pW; delete []pH; cout<<"destructor of Rectangle is called !\n"; }private: double *pW,*pH; int nR;};//-------------------------Rectangle::Rectangle(int n){ int i; nR=n; pH=new double[n]; pW=new double[n]; cout<<"input length and wide.\n"; for (i=0;i<n;i++) cin>>pH[i]>>pW[i];}class Circle:public Shape { public: Circle(int n); double Area(int i) const {return pC[i]*pC[i]*3.14;} int Get_N(void ) {return nC;} ~Circle() { delete[] pC; cout<<"destructor of Circle is called!\n"; }private: double *pC; int nC;};//-----------------------------------Circle::Circle( int n){ int i; nC=n; pC=new double[n]; cout<<"input radious .\n"; for (i=0;i<n;i++) cin>>pC[i];}class Application{ public: double Compute(Shape *s[],int n) const ;};//------------------------------------------double Application::Compute(Shape *s[],int n) const{ double sum=0; int n1=0; for (int i=0;i<n;i++) { n1=s[i]->Get_N(); for(int k=0;k=n1;k++) { sum+=s[i]->Area(k); cout<<"sum="<<sum<<"\tarea="<<s[i]->Area(k)<<endl; } } return sum;}class Myprogarm:public Application{ public: Myprogarm(); ~Myprogarm(); int Run();private: Shape **s;};//-------------------------------------------Myprogarm::Myprogarm(){ s=new Shape *[3]; int num=0; cout<<"input the number of triangles.\n"; cin>>num; s[0]=new Triangle(num); cout<<"input the number of rectangles.\n"; cin>>num; s[1]=new Rectangle(num); cout<<" input the number of circles .\n"; cin>>num; s[2]=new Circle(num);}int Myprogarm::Run(){ double sum=Compute(s,3); cout<<sum<<endl; return 0;}//--------------------------------------------Myprogarm::~Myprogarm(){ int i; for(i=0;i<3;i++) delete s[i]; delete []s;}//------------------------------------------void main(){ Myprogarm().Run();}