C++的算闰年的题

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#include
using namespace std;
class Teacher
{
public:
Teacher(string name,int hour){Name=name;Hour=hour;}
virtual int pay()=0;
virtual void display()=0;
private:
string Name;
int Hour;
};

class jiangshi:public Teacher
{
public:
jiangshi(string name,int hour):Teacher(name,hour)
{
h=hour;
}
int pay()
{
return 2000+20*h;
}
void display()
{
cout<}
private:
int h;
};
class jiaoshou:public Teacher
{
public:
jiaoshou(string name,int hour):Teacher(name,hour)
{
h=hour;
}
int pay()
{
return 4000+40*h;
}
void display()
{
cout<}
private:
int h;
};
class fujiaoshou:public Teacher
{
public:
fujiaoshou(string name,int hour):Teacher(name,hour)
{
h=hour;
}
int pay()
{
return 3000+30*h;
}
void display()
{
cout<}
private:
int h;
};
int main()
{
char name[10];
int hour;
cin>>name>>hour;
jiaoshou js(name,hour);
js.display();
return 0;
}

矩形的那个
#include
using namespace std;
class Rectangle
{
public:
Rectangle()
{
cout<<"函数已构造!"<}

~Rectangle()
{ cout<<"函数已析构!"<double Area_Rectangle()
{
return (len*wid);
}

double len;
double wid;
};
class Cuboid:public Rectangle
{
public:
Cuboid()
{
cout<<"函数已构造!"<}
void Input()
{
cout<<"请输入长方体的长、宽、高:"<cin>>len>>wid>>height;
}
~Cuboid()
{
cout<<"函数已析构!"<}
double Volum_Cuboid()
{
return len*wid*height;
}
private:
double height;
};
int main()
{
Cuboid c;
c.Input();
c.Volum_Cuboid();
cout<<"长方体体积为:"<return 0;
}

//闰年
#include
using namespace std;
class Date
{
public:
void input();
void display();
void juage();
private:
int year,month,day;
};
void Date::input()
{
cin>>year>>month>>day;
}
void Date::juage()
{
if((year%4==0)&&(year%100!=0)||(year%400==0))
cout<<"是闰年!"<else
cout<<"不是闰年!"<}
int main()
{
Date date1;
date1.input();
date1.juage();
return 0;
}

#include
using namespace std;
class Techer{};
class jiangshi{};
class fujiaoshou{};
void main()
{
char name[10];
int hour;
cin>>name>>hour;
cout<<4000+40*hour<}