Code for the Homework1 改进

 #include <iostream>
 #include <vector>
 #include "shape.h"
 //using namespace std;
 //using namespace Eigen;  在shape.h中
 const double PI=3.141592653;
 vector<SHAPE*> sv;
 vector<SHAPE*>::iterator itr;
 POINT p;
 LINE l;
 TRIANGLE t;
 void Shape_Save(void);
 void Shape_Handle(void);
 int main()
 {
     int flag;
     )
     {
         cout << "存图形请输入0，操作图形请输入1" << endl;
         cin >> flag;
         switch (flag)
         {
         :Shape_Save();break;
         :Shape_Handle(); break;
         default:cout << "输入错误！" << endl; break;
         }
     }

     ;
 }

 void Shape_Save()
 {
     string name;
     int num;
     cout << "请输入图形名称 点数 坐标" << endl;
     cin >> name;
     cin >> num;
     switch (num)
     {
     :
     {
         p.name=name;
         p.get_cin_point();
         sv.push_back(&p);
         break;
     }
     :
     {
         l.name=name;
         l.get_cin_line();
         sv.push_back(&l);
         break;
     }
     :
     {
         t.name=name;
         t.get_cin_triangle();
         sv.push_back(&t);
         break;
     }
     default: {cout << "点数输入错误" << endl; break; }
     }

 }
 void Shape_Handle(void)
 {
     string cmd,name1;
     char a, b, c;
     Vector2d vec;
     double x,y,angle;
     cout << "请输入操作指令" << endl;
     cin >> cmd;
     cin>> name1;
     if (cmd == "move")
     {
         cin >> a >> x >> b >> y >> c;
         vec[]=x;vec[]=y;
 //        for(int i=0;i<sv.size();i++)
 //        {
 //            if(name1 == sv[i]->name)
 //            {
 //                cout<<"i="<<i<<endl;
 //                sv[i]->move(vec);
 //                cout << sv[i]->name<<"平移后为:";
 //                sv[i]->display();
 //            }
 //        }
         for (itr = sv.begin(); itr != sv.end(); itr++)  //迭代器方式
         {
             if(name1== (*itr)->name)
             {
                 (*itr)->move(vec);
                 cout << (*itr)->name<<"平移后为:";
                 (*itr)->display();
             }

          }
     }
     else if (cmd == "rotate")
     {
         cin >> angle;
 //        for(int i=0;i<sv.size();i++)
 //        {
 //            if(name1 == sv[i]->name)
 //            {
 //                sv[i]->rotate(angle);
 //                cout << sv[i]->name<<"旋转后为:";
 //                sv[i]->display();
 //            }
 //        }
         for (itr = sv.begin(); itr != sv.end(); itr++)  //迭代器方式
         {
             if(name1== (*itr)->name)
             {
                 (*itr)->rotate(angle);
                 cout << (*itr)->name<<"旋转后为:";
                 (*itr)->display();
             }
          }
     }
     else cout << "comand is error!" << endl;
 } 

main.cpp

 #include <Eigen/Dense>
 #include <iostream>
 #include <vector>
 using namespace Eigen;
 using namespace std;
 extern const double PI;
 class SHAPE
 {
     public:
     string name;
     ;
 //    {
 //        cout<<1;
 //        return;
 //    };
     ;
 //    {
 //        cout<<1;
 //        return;
 //    }
     ;
 //    {
 //        cout<<1;
 //        return;
 //    }
 };
 class POINT:public SHAPE
 {
     public:
         double x, y;
         POINT(){
         };
         POINT(string nam,double xx,double yy){
             name=nam;
             x=xx;
             y=yy;
         }
         POINT(const POINT &p){
             name=p.name;
             x=p.x;
             y=p.y;
         }
         void copyto(POINT &p);
         void get_cin_point(void);
         void display();
         void rotate(double &angle);
         void move(Vector2d &vec);
 };
 class LINE:public SHAPE
 {
     public:
         POINT p_start,p_end;
         LINE(){
         }
         LINE(string nam,POINT s,POINT e)
         {
             name=nam;
             s.copyto(p_start);
             e.copyto(p_end);
         }
         void get_cin_line(void);
         void display();
         void rotate(double &angle);
         void move(Vector2d &vec);
 };
 class TRIANGLE:public SHAPE
 {
     public:
         POINT p1,p2, p3;
         TRIANGLE(){
         }
         TRIANGLE(string nam,POINT pp1,POINT pp2,POINT pp3)
         {
             name=nam;
             pp1.copyto(p1);
             pp2.copyto(p2);
             pp3.copyto(p3);
         }
         void get_cin_triangle(void);
         void display();
         void rotate(double &angle);
         void move(Vector2d &vec);
 }; 

shape.h

 #include "shape.h"
 /*****POINT类成员函数的实现****/
 void POINT::copyto(POINT &p){
     p.name=name;
     p.x=x;
     p.y=y;
 }
 void POINT::get_cin_point(void){
     char a, b, c;
     cin >> a >> x >> b >> y >> c ;
 }
 void POINT::display() {
     cout << "(" << this->x << "," << this->y << ")" << endl;
 }
 void POINT::rotate(double &angle){  //逆时针为正
     double x, y,ang;
     x = this->x;
     y = this->y;
     ang = angle*PI/ ;
     this->x = x*cos(ang) - y*sin(ang);
     this->y = x*sin(ang) + y*cos(ang);
 }

 void POINT::move(Vector2d &vec){
     ];
     ];
 }

 /*****LINE类成员函数的实现****/
 void LINE::get_cin_line(void){
     char a, b, c;
     cin >> a >>p_start.x>> b >> p_start.y >> c >> a >>p_end.x>> b >> p_end.y >> c;
 }
 void LINE::display(){
             cout<<"起点";
             p_start.display();
             cout<<"终点";
             p_end.display();
 }
 void LINE::rotate(double &angle){
             p_start.rotate(angle);
             p_end.rotate(angle);
 }
 void LINE::move(Vector2d &vec){
             p_start.move(vec);
             p_end.move(vec);
 }

 /*****TRIANGLE类成员函数的实现****/
 void TRIANGLE::get_cin_triangle(void){
     char a, b, c;
     cin >> a >>p1.x>> b >> p1.y >> c >> a >>p2.x>> b >> p2.y >> c>> a >>p3.x>> b >> p3.y >> c;
 }
 void TRIANGLE::display() {
     cout<<"顶点1";
     p1.display();
     cout<<"顶点2";
     p2.display();
     cout<<"顶点3";
     p3.display();
 }
 void TRIANGLE::rotate(double &angle){
     p1.rotate(angle);
     p2.rotate(angle);
     p3.rotate(angle);
 }
 void TRIANGLE::move(Vector2d &vec){
     p1.move(vec);
     p2.move(vec);
     p3.move(vec);
 }

shape.cpp

运行结果：