C++派生与继承题，急求解

自己修改，该删的删。如果不懂，到群151988677，找千里，大家一起探讨
#include "iostream.h"
#include
#include "string.h"
#include
#include
#define PI 3.14159
using namespace std;
int ct=0,count=0;
float area[100],circumference[100];
void quick_sort(float a[],float z[],int low,int high);
int partition(float a[],float z[],int low,int high);
void Output(const float a[],const float z[],const int count);
//数据输出
void Output(const float a[],const float z[],const int count)
{
cout<<"面积: "< for(int i=1;i<=count;i++)
cout<}
//抽象类
class Base
{
public:
virtual float Area()=0;
virtual float Girth()=0;
virtual void setfromfile();
virtual void printtofile(int);
};
//对创建的对象按面积排序屏幕输出
void Base::setfromfile()
{ char s[20];
int i=1;
float a[100],z[100];
cin>>s;count=0;
strcat(s,".geo");
ifstream file(s);
if(file)
{
file.seekg(0);

while(file) //文件读
{
count++;
file.read(reinterpret_cast(&a[i]),sizeof(a[i]));
file.read(reinterpret_cast(&z[i]),sizeof(z[i]));
i++;
}
count--;

quick_sort(z,a,1,count);//数据按周长排序
system("cls");
cout<<"输出结果按周长大小排序"< Output(a,z,count);//屏幕输出

}
else {system("cls");cout<<"该文件不存在!";}
cout<<"输入任意字符结束";
char j;
cin>>j;

}
//按面积排序屏幕输出或者按面积排序文件输出新数据追加到文件尾
void Base::printtofile(int i)
{
if(i==1)
{ quick_sort(area,circumference,1,ct);//按面积排序
system("cls");
cout< Output(area,circumference,ct);//屏幕输出
}
else
{
char s[20];
cout< cin>>s;
strcat(s,".geo");
quick_sort(area,circumference,1,ct);

ofstream file(s,ios_base::app);
cout< for(int i=1;i<=ct;i++)
{
file.write(reinterpret_cast(&area[i]),sizeof(area[i]));
file.write(reinterpret_cast(&circumference[i]),sizeof(circumference[i]));
}
system("cls");
cout< file.close();
}
}

//点类
class Point
{
private:
float x,y; //点坐标
public:
Point(float x=0.0,float y=0.0):x(x),y(y){}
float getx(){return x;}
float gety(){return y;}
};
//矩形类
class Rec:public Base
{
private:
Point a,b;
float h,l;
public:
Rec(Point a=NULL,Point b=NULL):a(a),b(b)
{h=b.getx()-a.getx();
l=b.gety()-a.gety();
ct++;area[ct]=Area();
circumference[ct]=Girth();}
float Area();
float Girth();
};
//矩形面积
float Rec::Area()
{
return h*l;
}
//矩形周长
float Rec::Girth()
{
return 2*(l+h);
}

//三角形类
class Tri:public Base
{
private:
Point a,b,c;//三角形的三个顶点
public:
Tri(Point a=NULL,Point b=NULL,Point c=NULL):a(a),b(b),c(c)
{
ct++;area[ct]=Area();
circumference[ct]=Girth();
}
float Area();
float Girth();

};
//三角形面积
float Tri::Area()
{
float l1=sqrt((a.getx()-b.getx())*(a.getx()-b.getx())+(a.gety()-b.gety())*(a.gety()-b.gety()));
float l2=sqrt((a.getx()-c.getx())*(a.getx()-c.getx())+(a.gety()-c.gety())*(a.gety()-c.gety()));
float l3=sqrt((c.getx()-b.getx())*(c.getx()-b.getx())+(c.gety()-b.gety())*(c.gety()-b.gety()));
float l=(l1+l2+l3)/2;
return sqrt(l*(l-l1)*(l-l2)*(l-l3));
}
/***********三角形周长***********/
float Tri::Girth()
{

float l1=sqrt((a.getx()-b.getx())*(a.getx()-b.getx())+(a.gety()-b.gety())*(a.gety()-b.gety()));
float l2=sqrt((a.getx()-c.getx())*(a.getx()-c.getx())+(a.gety()-c.gety())*(a.gety()-c.gety()));
float l3=sqrt((c.getx()-b.getx())*(c.getx()-b.getx())+(c.gety()-b.gety())*(c.gety()-b.gety()));
return l1+l2+l3;
}
int jiancha(Point &a,Point &b,Point &c)
{
float l1=sqrt((a.getx()-b.getx())*(a.getx()-b.getx())+(a.gety()-b.gety())*(a.gety()-b.gety()));
float l2=sqrt((a.getx()-c.getx())*(a.getx()-c.getx())+(a.gety()-c.gety())*(a.gety()-c.gety()));
float l3=sqrt((c.getx()-b.getx())*(c.getx()-b.getx())+(c.gety()-b.gety())*(c.gety()-b.gety()));
if(l1+l2<=l3||l1+l3<=l2||l2+l3<=l1)
return 1;
return 0;
}
/***********圆类***********/

class Circle:public Base
{
private:
Point a;
float r;
public:
Circle(Point a=NULL,float r=0):r(r)
{ct++;area[ct]=Area();
circumference[ct]=Girth();}
float Area();
float Girth();
};
/***********圆面积***********/
float Circle::Area()
{
return PI*r*r;
}
/***********圆周长***********/
float Circle::Girth()
{
return 2*PI*r;
}

/***********扇形类***********/
class S:public Base
{
private:
Point a;/***********左上顶点***********/
float r,b;/***********半径及弧度***********/
public:
S(Point a=NULL,float r=0,float b=0):a(a),r(r),b(b)
{ct++;area[ct]=Area();
circumference[ct]=Girth();}
float Area();
float Girth();
};
/***********扇形面积***********/
float S::Area()
{
return b/2*r*r;
}
//扇形周长
float S::Girth()
{
return 2*r+b*r;
}

//梯形类
class T:public Base
{
private:
Point a,b;//左下顶点，右上角顶点
float l1,l2,l3,l4,h;
public:
T(Point a=NULL,Point b=NULL,float l1=0,float l2=0,float l3=0,float l4=0):a(a),b(b),l1(l1),l2(l2),l3(l3),l4(l4)
{h=b.gety()-a.gety();
ct++;area[ct]=Area();
circumference[ct]=Girth();}
float Area();
float Girth();
};
//梯形面积
float T::Area()
{
return (l1+l2)/2*h;
}
//梯形周长
float T::Girth()
{
return l1+l2+l3+l4;
}

//键盘输入数据保存菜单
template
void Menu1(t m)
{ cout<<"面积:"< char num;
do
{
cout< cout<<"2:文件输出:"< cout<<"其他任意键回到主界面:"<
cin>>num;
switch(num)
{
case '1':m.printtofile(1);break; //文件数据按面积排序屏幕输出
case '2':m.printtofile(2);break;//文件数据按面积排序文件输出
default:{system("cls");break;}
}
}while(num=='1'||num=='2');
}
void geshi(float &n)
{
cin>>n;
while(!cin)
{cin.clear(0);cin.ignore(1000,'\n');cout<<"格式错误,请重输!"<>n;}
}
void geshi(float &n,int &flag)
{
cin>>n;
if(!cin)
{cin.clear(0);cin.ignore(1000,'\n');flag=1;}
}
void geshi(char &c,int &flag)
{
cin>>c;
if(c!=',')
{flag=1;cin.ignore(1000,'\n');}
}
void shuru(float &n,char &c,float &m)
{ int flag;
do
{
flag=0;
geshi(n);
geshi(c,flag);
geshi(m,flag);
if(flag)
cout<<"格式错误,请重输!"< }while(flag);
}
/***********矩形操作***********/
void Rectangle()
{
cout< float n,m;int flag;
char c;
while(1)
{ int i=0;
flag=0;
cout< shuru(n,c,m);
Point a(n,m);
cout< shuru(n,c,m);
if(a.getx()>=n||a.gety()>=m)
{
cout<<"输入错误，右上角点的坐标x/y应该>矩形左下角点的坐标x/y";
flag=1;
}
else
{Point b(n,m);
Rec m(a,b);
Menu1(m);}

if(!flag) break;
}
}
/***********三角形操作***********/
void Triangle()
{
float x1,y1;
char c;
cout< while(1)
{
int flag=0;
cout< shuru(x1,c,y1);Point a(x1,y1);
cout< shuru(x1,c,y1);Point b(x1,y1);
cout< shuru(x1,c,y1);Point e(x1,y1);
if(jiancha(a,b,e))
{
system("cls");
cout<<"输入数据有误,不是三角形的三个顶点,请重输!"< flag=1;
}
else
{
Tri t(a,b,e);//创建三角形对象
Menu1(t);
}

if(!flag) break;
}
}
//圆形
void circle()
{
float x1,y1,r;
char c;
cout< cout< shuru(x1,c,y1);
while(1)
{
cout<0:";
cin>>r;
if(r>0) break;//数据格式都正确跳出
cout<<"格式错误,请重输!(半径>0):"< }
Point a(x1,y1);
Circle ci(a,r);//圆对象
Menu1(ci);

}
//扇形
void Scall()
{
float x1,y1,r,b;
char c;
cout< while(1)
{
int flag=0;
cout< shuru(x1,c,y1);
while(1)
{
cout<0:";
cin>>r;
if(r>0) break;//数据都正确
cout<<"格式错误,请重输!扇形半径>0"< }
while(1)
{
cout<0&&b<2*"< cin>>b;
if(b>0&&b<2*PI) break;/***********数据格式都正确跳出***********/
cout<<"格式错误,请重输!(b>0&&b<2*"< }
Point a(x1,y1);
S c(a,r,b); //创建扇形对象
Menu1(c);

if(!flag) break;
}
}
//梯形
void Trape()
{
float x1,y1,l1,l2,l3,l4;
char c;int flag;
do
{ flag=0;
cout< cout< shuru(x1,c,y1);
Point a(x1,y1);
cout< shuru(x1,c,y1);
if(a.getx()>=x1||a.gety()>=y1)
{
cout<<"输入错误，右上角点的坐标x/y应该>矩形左下角点的坐标x/y";
flag=1;
}
else{
Point b(x1,y1);
while(1)
{
cout< cin>>l1>>c>>l2>>c>>l3>>c>>l4;
if(l1>0&&l2>0&&l3>0&&l4>0&&c==',') break;//数据格式都正确
cout<<"数据输入错误,请重输!边长应该大于0"< }
T t(a,b,l1,l2,l3,l4);//创建梯形对象
Menu1(t);
}
}while(flag);
}
int partition(float a[],float z[],int low,int high)
{
a[0]=a[low];z[0]=z[low];
while(low {
while(low=a[0]) high--;
if(low while(low if(low
}
a[low]=a[0];z[low]=z[0];
return low;
}
void quick_sort(float a[],float z[],int low,int high)
{
if(low {
int i;
i=partition(a,z,low,high);
quick_sort(a,z,low,i-1);
quick_sort(a,z,i+1,high);
}
}

/***********主菜单***********/
void Menu()
{ T a;
while(1)
{
cout< cout<<" * A:矩形 *"< cout<<" * B:三角型 *"< cout<<" * C:圆形 *"< cout<<" * D:扇型 *"< cout<<" * E:梯形 *"< cout<<" * F:文件输出 *"< cout<<" * 其他任意键结束程序 *"< cout<<" *******************************"< cout<<"请选择你要操作的图形代号:"< char num;
cin>>num;
int flag=0;
switch(num)
{
case 'a':
case 'A':Rectangle();break;
case 'b':
case 'B':Triangle();break;
case 'c':
case 'C':circle();break;
case 'd':
case 'D':Scall();break;
case 'e':
case 'E':Trape();break;
case 'f':
case 'F':cout<<"请输入要屏幕输出的文件名!"< default:{flag=1;cout<<"结束程序!"< }
if(flag) break;
}
}

/***********主函数***********/
int main(int argc, char* argv[])
{
Menu();
return 0;
}