cplusplus第2章

//第2题

#include<iostream>
using namespace std;
class Time
{
private:
  int hour;
  int minute;
  int sec;
public:
  void setdata()
  {
   cin>>hour;
   cin>>minute;
   cin>>sec;
  }
  void outdata()
  {
   cout<<hour<<':'<<minute<<':'<<sec<<endl;
  }
};
Time T;
int main()
{
 T.setdata();
 T.outdata();
 return 0;
}

//第3题

#include <iostream>

using namespace std;

class Time

 {public:

   void set_time(void);

   void show_time(void);

  private:

   int hour;

   int minute;

   int sec;

  };

 

void Time::set_time(void)

 {cin>>hour;

  cin>>minute;

  cin>>sec;

  }

 

void Time::show_time(void)

{cout<<hour<<":"<<minute<<":"<<sec<<endl;}

 

Time t;

int main()

{ t.set_time();

 t.show_time();

 return 0;
} 

//第4题

//第6题

#include<iostream>

using namespace std;

class  Cuboid

{public:

         void get_value();

         void volume();

         void display();

private:

          float length,width,height,vol;

};

void Cuboid::get_value()

{

 cin>>length>>width>>height;

};

void Cuboid::volume()

{

 vol=length*width*height;

}

void Cuboid::display()

{

 cout<<vol<<endl;

}

int main()

{

 Cuboid c1,c2,c3;

 c1.get_value();

 c1.volume();

 cout<<"The volume of c1 is:";

 c1.display();

 c2.get_value();

 c2.volume();

 cout<<"The volume of c2 is:";

 c2.display();

 c3.get_value();

 c3.volume();

 cout<<"The volume of c3 is:";

 c3.display();

 return 0;

}