#include"stdio.h"

#include"conio.h"

#include"iostream.h"

#include"iomanip.h"

#include"math.h"

class sinhvien

    {

            private:

                    char masv[5];

                    char hoten[35];

                        char noisinh[35];

                        char lop[10];

                public:

                    void nhap();

                        void xuat();

                        };

void sinhvien::nhap()

    {

            cout<<"

Nhap ma sinh vien:"; gets(masv);

                cout<<"

Nhap ho ten:"; gets(hoten);

                cout<<"

Nhap noi sinh:"; gets(noisinh);

                cout<<"

Nhap lop:"; gets(lop);

                }

void sinhvien::xuat()

    {

            cout<<"

"<<setw(5)<<masv<<setw(10)<<hoten<<setw(10)<<noisinh<<setw(8)<<lop;

                }

class xahoi:public sinhvien

    {

            private:

                    float mon1;

                        float mon2;

                        float dtb;

                public:

                    void nhapxh();

                        void xuatxh();

                        friend void sapxep(xahoi *sv,int n);

                        friend void hocbong(xahoi *sv,int n);

                        };

void xahoi::nhapxh()

    {

            nhap();

            cout<<"

Nhap diem mon 1:"; cin>>mon1;

                cout<<"

Nhap diem mon 2:"; cin>>mon2;

                dtb=(mon1+mon2)/2;

                }

void xahoi::xuatxh()

    {

            xuat();

            cout<<setw(3)<<mon1<<setw(10)<<mon2<<setw(10)<<dtb;

                }

void sapxep(xahoi *sv,int n)

    {

            int i,j;

                xahoi tg;

                for(i=1;i<n;i++)

                for(j=i+1;j<=n;j++)

                if(sv[i].dtb>sv[j].dtb)

                {

                    tg=sv[i];

                        sv[i]=sv[j];

                        sv[j]=tg;

                }

        }

void hocbong(xahoi *sv,int n)

    {

            int i,t;

                t=n*10/100;

                sapxep(sv,n);

                cout<<"

Danh sach sinh vien dat hoc bong khoa xa hoi la:";

                cout<<"

Masv    hoten   noisinh     lop    diemtoan    diemly     DTB";

                for(i=1;i<=t;i++)

                if(sv[i].dtb>=7)

                sv[i].xuatxh();

        }

class tunhien:public sinhvien

    {

            private:

                    float diemtoan;

                        float diemly;

                        float dtb;

                public:

                        void nhaptn();

                        void xuattn();

                        friend void sapxep(tunhien *sv,int n);

                        friend void hocbong(tunhien *sv,int n);

                };

void tunhien::nhaptn()

    {

            nhap();

            cout<<"

Nhap diem toan:"; cin>>diemtoan;

                cout<<"

Nhap diem ly:"; cin>>diemly;

                dtb=(diemtoan+diemly)/2;

                }

void tunhien::xuattn()

    {

            xuat();

            cout<<setw(3)<<diemtoan<<setw(10)<<diemly<<setw(10)<<dtb;

                }

void sapxep(tunhien *sv,int n)

    {

            int i,j;

                tunhien tg;

                for(i=1;i<n;i++)

                for(j=i+1;j<=n;j++)

                if(sv[i].dtb>sv[j].dtb)

                {

                    tg=sv[i];

                        sv[i]=sv[j];

                        sv[j]=tg;

                }

        }

void hocbong(tunhien *sv,int n)

    {

            int i,t;

                t=n*10/100;

                sapxep(sv,n);

                cout<<"

Danh sach sinh vien dat hoc bong khoa tu nhien la:";

                cout<<"

Masv    hoten   noisinh     lop    diemtoan    diemly     DTB";

                for(i=1;i<=t;i++)

                if(sv[i].dtb>=7)

                sv[i].xuattn();

        }

void main()

    {

           xahoi svxh[50];

           tunhien svtn[50];

           int i,n,m;

           clrscr();

           cout<<"

Nhap so sinh vien khoa xa hoi n="; cin>>n;

           for(i=1;i<=n;i++)

           svxh[i].nhapxh();

           cout<<"

Danh sach sinh vien khoa xa hoi sau khi nhap la:";

           cout<<"

Masv    hoten   noisinh     lop    diemtoan    diemly     DTB";

           for(i=1;i<=n;i++)

           svxh[i].xuatxh();

           hocbong(svxh,n);

           cout<<"

Nhap so sinh vien khoa tu nhien m="; cin>>m;

           for(i=1;i<=m;i++)

           svtn[i].nhaptn();

           cout<<"

Danh sach sinh vien khoa tu nhien sau khi nhap la:";

           cout<<"

Masv    hoten   noisinh     lop    diemtoan    diemly     DTB";

           for(i=1;i<=m;i++)

           svtn[i].xuattn();

           hocbong(svtn,m);

                getch();

           }