线段长度_skybeauty_新浪博客

组合类构造函数

#ifndef juli_Header_h

#define juli_Header_h

class point

{

private:

   int X,Y;

public:

    point(int X ,int Y);

    point(point & t);

   int getx();

   int gety();

   void get();

    ~point();

};

class line

{

public:

    line(point x,point y);

    line(line & s);

   void get();

private:

   double length;

   point x1,y1;

};

#endif

#include

#include

#include "Header.h"

using namespace std;

point:: point(int X ,int Y)

{

   static int i=0;

    i++;

    cout<<"带参数的构造函数被调用"<<i<<"次"<<"\n";

   this->X=X;

   this->Y=Y;

}

point::point(point & t)

{

   static int j=0;

    j++;

    cout<<"带类对象的引用的构造函数被调用"<<j<<"次"<<"\n";

   X=t.X;

   Y=t.Y;

}

int point:: getx()

{

   return X;

}

int point:: gety()

{

   return Y;

}

void point::get()

{

   cout<<"X="<<X<<"\n";

   cout<<"Y="<<Y<<"\n";

}

point:: ~point()

{

   static int a=0;

    a++;

    cout<<"析构函数被调用"<<a<<"次"<<"\n";

}

line::line(point x,point y):x1(x),y1(y)

{

    cout<<"类的line构造函数被调用"<<"\n";

   double x2=double(x1.getx()-y1.getx());

   double y2=double(x1.gety()-y1.gety());

   length=sqrt(x2*x2+y2*y2);

    

}

line::line(line & s):x1(s.x1),y1(s.y1)

{

    cout<<"line的拷贝构造函数被调用"<<"\n";

    length=s.length;

}

void line:: get()

{

    cout<<"length="<<length<<"\n";

}

#include

#include "Header.h"

using namespace std;

int main (int argc, const char * argv[])

{

    // insert code here...

   int x,y;

   cin>>x>>y;

   point p(x,y);

    

   cin>>x>>y;

   point p1(x,y);

    

    p.get();

    p1.get();

    

   line l(p,p1);

    l.get();

    

   line s(l);

    s.get();

    

    

    std::cout << "Hello, World!\n";

   return 0;

}