// quan ly sinh vien

#include<iostream.h>

#include<conio.h>

#include<iomanip.h>

#include<stdio.h>

class SV

{

char ht[25];

int ngay,thang,nam;

char lop[10];

float t,l,h,dtb;

public:

friend istream& operator>>(istream& is,SV &b);

friend ostream& operator<<(ostream& os,SV b);

int operator>(SV);

};

istream& operator>>(istream& is,SV &b)

{fflush(stdin);

cout<<"nhap ten: ";gets(b.ht);

cout<<"nhap lop: ";gets(b.lop);

cout<<"nhap diem toan ly hoa:

";is>>b.t>>b.l>>b.h;

b.dtb=(b.t+b.l+b.h)/3;

return(is);

}

ostream& operator<<(ostream& os,SV b)

{ os<<b.ht<<'

'<<b.lop<<'

'<<b.t<<" "<<b.l<<" "<<b.h<<'

'<<"diem tb: "<<b.dtb;

return(os);

}

int SV::operator>(SV b)

{int kq;

if((dtb-b.dtb)>0) kq=1;

else kq=0;

return(kq);

}

main()

{ int n;SV a[50];

cout<<"nhap danh sach: ";cin>>n;

for(int i=0;i<n;i++)

{ cin>>a[i]; } clrscr();

for(i=0;i<n-1;i++)

for(int j=i;j<n;j++)

if(a[j]>a[i])

{ SV tg=a[i];

a[i]=a[j];

a[j]=tg; }

for(i=0;i<n;i++)

{ cout<<a[i]<<'

'; }

getch();

}