#include<iostream.h>
#include<string.h>
#include<assert.h>
#include<iomanip.h>
#include<math.h>

#define NUM 50    //定义每个类数组的最大成员个数

class Point    //定义点类即角色
{
    public:
        void set(int xx,int yy)    //赋值坐标
        {
            x=xx;
            y=yy;
        }
        void setname(char *n)    //赋值名字
        {
            name=new char[strlen(n)+1];    //申请空间
            assert(name!=0);    //判断是否申请成功
            strcpy(name,n);
        }
        int getx()    //返回坐标x
        {
            return x;
        }
        int gety()    //返回坐标y
        {
            return y;
        }
        char *getname()    //返回名字
        {
            return name;
        }
        friend ostream & operator<<(ostream &output,Point &);    //重载流输出运算符
        virtual ~Point()    //定义虚析构函数
        {
            delete [] name;
        }
    private:
        int x,y;
        char *name;
};
ostream & operator<<(ostream &output,Point &q)
{
    output <<"("<<q.getx()<<","<<q.gety()<<")"<<";"<<q.getname()<<endl;
    return output;
}

class Line:public Point    //定义线类即道路
{
    public:
        void set(int xx1,int yy1,int xx2,int yy2)    //赋值道路两端点坐标
        {
            x1=xx1;
            y1=yy1;
            x2=xx2;
            y2=yy2;
        }
        int getx1()    //返回坐标x1
        {
            return x1;
        }
        int gety1()    //返回坐标y1
        {
            return y1;
        }
        int getx2()    //返回坐标x2
        {
            return x2;
        }
        int gety2()    //返回坐标y2
        {
            return y2;
        }
        friend ostream & operator<<(ostream &output,Line &);    //重载流输出运算符
        ~Line(){}    //自定义析构函数
    private:
        int x1,y1,x2,y2;
};
ostream & operator<<(ostream &output,Line &q)
{
    output <<sqrt((q.getx1()-q.getx2())*(q.getx1()-q.getx2())+(q.gety1()-q.gety2())*(q.gety1()-q.gety2()))<<";"<<q.getname()<<endl;
    return output;
}

class Rectangle:public Point    //定义矩形类即小地图
{
    public:
        void setlw(int l,int w)    //赋值矩形长、宽
        {
            length=l;
            width=w;
        }
        int getlength()    //返回矩形长
        {
            return length;
        }
        int getwidth()    //返回矩形宽
        {
            return width;
        }
        friend ostream & operator<<(ostream &output,Rectangle &);    //重载流输出运算符
        ~Rectangle(){}    //自定义析构函数
    private:
        int length,width;
};
ostream & operator<<(ostream &output,Rectangle &q)
{
    output <<"("<<q.getx()<<","<<q.gety()<<")"<<";"<<q.getlength()*q.getwidth()<<";"<<q.getname()<<endl;
    return output;
}

void menu()    //用户操作选单函数
{
    cout<<"|------------------MENU------------------|"<<endl;
    cout<<"Input New Point&Output Point.............1"<<endl;
    cout<<"Input New Line&Output Line...............2"<<endl;
    cout<<"Input New Rectangle&Output Rectangle.....3"<<endl;
    cout<<"Quit.....................................0"<<endl;
}

void main()
{
    Point p[NUM];    //点类数组
    Line li[NUM];    //线类数组
    Rectangle r[NUM];    //矩形类数组
    int xx,yy,xx1,yy1,xx2,yy2,l,w;
    int c;
    int i=0,j=0,k=0;
    int sum=0;
    int a,b,d;
    char n[NUM];
    menu();
    cout<<"Please chioce:";
    cin>>c;
    while(c!=0)
    {
        switch(c)
        {
            case 1:
                cout<<"Enter x and y:";
                cin>>xx>>yy;
                if(i>NUM)
                {
                    cout<<"no position!"<<endl;
                    break;
                }
                p[i].set(xx,yy);
                cout<<"Enter point's name:";
                cin>>n;
                p[i].setname(n);
                cout<<"completed."<<endl;
                for(a=0;a<i+1;a++)
                    cout<<p[a];
                sum=sum+1;    //计算角色个数
                cout<<"Totally "<<sum<<" persons."<<endl;
                i=i+1;
                break;
            case 2:
                cout<<"Enter x1,y1 and x2,y2:";
                cin>>xx1>>yy1>>xx2>>yy2;
                if(j>NUM)
                {
                    cout<<"no position!"<<endl;
                    break;
                }
                li[j].set(xx1,yy1,xx2,yy2);
                cout<<"Enter line's name:";
                cin>>n;
                li[j].setname(n);
                cout<<"completed."<<endl;
                for(b=0;b<j+1;b++)
                    cout<<li[b];
                j=j+1;
                break;
            case 3:
                cout<<"Enter x and y:";
                cin>>xx>>yy;
                if(k>NUM)
                {
                    cout<<"no position!"<<endl;
                    break;
                }
                r[k].set(xx,yy);
                cout<<"Enter length and width:";
                cin>>l>>w;
                r[k].setlw(l,w);
                cout<<"Enter rectangle's name:";
                cin>>n;
                r[k].setname(n);
                cout<<"completed."<<endl;
                for(d=0;d<k+1;d++)
                    cout<<r[d];
                k=k+1;
                break;
        }
        menu();
        cout<<"Please chioce:";
        cin>>c;
    }

}









编译没错误。运行没错误。唯独选择0退出的时候跳出那个发送错误报告的错误对话框。这是怎么回事？多谢了。我比较急。

加个自定义构造函数就OK了。问题解决。