设计Person类 代码参考

 #include <iostream>

 using namespace std;

 class Trapezium
 {
     private:
         int x1,y1,x2,y2,x3,y3,x4,y4;
     public:
         void initial(){x1=,x2=;x3=;x4=;y1=;y2=;y3=;y4=;return;}
         void GetPosition(int&,int&,int&,int&,int&,int&,int&,int&);
         void Area()
         {
             double s;
             s=((x2-x1)+(x4-x3))*(y2-y4)/2.0;
             cout<<s<<endl;
             return;
         }
 };

 void Trapezium::GetPosition(int& a,int& b,int& c,int& d,int& e,int& f,int& g,int& h)
 {
     x1=a;y1=b;x2=c;y2=d;x3=e;y3=f;x4=g;y4=h;
     return;
 }

 int main()
 {
     int x[],y[];
     Trapezium one;
     for(int i=;i<;i++)    cin>>x[i]>>y[i];
     one.initial();
     one.GetPosition(x[],y[],x[],y[],x[],y[],x[],y[]);
     one.Area();
     return ;
 }