Bai1

#include<iostream.h>

#include<conio.h>

#include<stdio.h>

class hocsinh

{

char hoten[25];

int lop;

float dtoan,dly,dhoa,tb;

public:

void nhap()

{

cout<<"Ho ten:";

fflush(stdin);

gets(hoten);

cout<<"lop:";cin>>lop;

cout<<"diemtoan:";cin>>dtoan;

cout<<"diem ly:";cin>>dly;

cout<<"diem hoa:";cin>>dhoa;

tb=(dtoan+dly+dhoa)/3;

}

void xuat()

{

cout<<"

hoten:"<<hoten;

cout<<"

lop:"<<lop;

cout<<"

diem toan:"<<dtoan;

cout<<"

diem ly:"<<dly;

cout<<"

diem hoa:"<<dhoa;

cout<<"

diemtrungbinh:"<<tb;

}

void sapxep()

{

if(tb>=5)

{

cout<<"

 "<<hoten;

cout<<"      "<<lop;

cout<<"         "<<dtoan;

cout<<"             "<<dly;

cout<<"                "<<dhoa;

cout<<"                   "<<tb;

}

}

};

hocsinh sinhvien[100];

main()

{

int i,n;

cout<<"nhap so sinh vien: ";cin>>n;

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

{

sinhvien[i].nhap();

}

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

{

 sinhvien[i].xuat();

 cout<<"

";

 }

cout<<"

nhung sinh vien co diem trung binh >=5";

cout<<"

Hoten      Lop     Diem toan    Diem ly     Diem hoa      Diem tb";

 for(i=0;i<n;i++)

{

sinhvien[i].sapxep();

}

getch();

}

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Bài 2:

 #include<iostream.h>

#include<conio.h>

#include<stdio.h>

class thucpham

{

char tenthucpham[25];

float giaca;

public:

void nhap()

{

cout<<"

ten thuc pham:";

fflush(stdin);

gets(tenthucpham);

cout<<"gia ca: ";cin>>giaca;

}

void xuat()

{

cout<<"

Ten thuc pham: "<<tenthucpham;

cout<<"

Gia ca: "<<giaca;

}

};

class tphop:public thucpham

{

int sohop;

public:

void nhap()

{

thucpham::nhap();

cout<<"so hop: ";cin>>sohop;

}

void xuat()

{

thucpham::xuat();

cout<<"

So hop:"<<sohop;

cout<<"

";

}

};

class tpkhop:public thucpham

{

float khoiluong;

public:

void nhap()

{

thucpham::nhap();

cout<<"khoi luong: ";cin>>khoiluong;

}

void xuat()

{

 thucpham::xuat();

cout<<"

Khoi luong: "<<khoiluong;

}

};

tphop tp[100]; // Bien toan cuc

tpkhop t[100]; // Bien toan cuc

int main()

{

int i,n;

cout<<"Nhap so luong san pham dong hop:";cin>>n;

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

{

tp[i].nhap();

}

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

{

tp[i].xuat();

}

cout<<"

Nhap so luong san pham khong hop:";cin>>n;

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

{

t[i].nhap();

}

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

{

t[i].xuat();

}

getch();

}

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Bài 3:

#include<iostream.h>

#include<conio.h>

#include<stdio.h>

class card

{

char tuadesach[100],tacgia[100];

public:

int soluongsach;

void nhap()

{

cout<<"Tua de sach:";

fflush(stdin);

gets(tuadesach);

cout<<"Tac gia:";

gets(tacgia);

cout<<"So luong sach: ";cin>>soluongsach;

}

void xuat()

{

cout<<"Tua de sach:"<<tuadesach;

cout<<"

Tac gia:"<<tacgia;

cout<<"

So luong sach:"<<soluongsach;

}

};

card s[100];

main()

{

int i,vt,n,max;

cout<<"Nhap so sach:";cin>>n;

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

{

s[i].nhap();

}

max=s[1].soluongsach;

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

{

if(s[i].soluongsach>max)

{

max=s[i].soluongsach;

vt=i;

}

}

cout<<"Cuon sach co so luong lon nhat la:"<<max;

s[vt].xuat();

getch();

}

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Bài 4:

#include<iostream.h>

#include<conio.h>

#include<stdio.h>

#include<string.h>

class date

{

int ngay,thang,nam;

public:

void nhap()

{

cout<<"

Ngay:";cin>>ngay;

cout<<"Thang:";cin>>thang;

cout<<"Nam: ";cin>>nam;

}

void xuat()

{

cout<<"          "<<ngay<<"/"<<thang<<"/"<<nam;

}

};

class nhansu:public date

{

int cmnd;

public:

char ten[25];

void nhap()

{

cout<<"Ten:";

fflush(stdin);

cout<<"ngay sinh";

date::nhap();

cout<<"So chung minh nhan dan:";cin>>cmnd;

}

void xuat()

{

cout<<"

"<<"          "<<ten<<"          ";

date::xuat();

cout<<"                      "<<cmnd<<"";

}

};

 nhansu nv[100];;

int main()

{

  int n,i,j;

  nhansu tg;

cout<<"Nhap so nhan su:";cin>>n;

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

{

nv[i].nhap();

}

  for(i=0;i<n-1;i++)

for(j=i+1;j<n;j++)

if(nv[i].ten<nv[j].ten)

{

tg=nv[i];

nv[i]=nv[j];

nv[j]=tg;

}

 cout<<"

Day sap xep tang dan:

";

 cout<<"----------ten----------|"<<"------ngaysinh-------"<<"|-------so cmnd-----------";

 for(i=0;i<n;i++)

{

nv[i].xuat();

 }

getch();

}

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Bài 5

#include<iostream.h>

#include<conio.h>

#include<stdio.h>

class ps

{

int tu,mau;

public:

friend ostream & operator<<(ostream&,ps);

friend istream & operator>>(istream&,ps&);

ps operator + (ps);

ps operator -  (ps);

};

ostream & operator<<(ostream & os,ps u)

{

os<<u.tu<<"/"<<u.mau<<endl;

return os;

}

istream & operator>>(istream & is,ps & u)

{

cout<<"phan tu:";is>>u.tu;

cout<<"phan mau:";is>>u.mau;

return is;

}

ps ps::operator +(ps v)

{

ps w;

w.tu=tu*v.mau+v.tu*mau;

w.mau=mau*v.mau;

return w;

}

ps ps::operator-(ps h)

{

g.tu=tu*h.mau-h.tu*mau;

g.mau=mau*h.mau;

return g;

}

int main()

{

ps a,b,c,d;

cin>>a;cout<<a;

cin>>b;cout<<b;

c=a+b;d=a-b;

cout<<"

Ket qua phep cong la:"<<c;

cout<<"

Ket qua phep tru la:"<<d;

getch();

}

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Bài 6:

#include<iostream.h>

#include<conio.h>

#include<stdio.h>

class xe

{

char nhanhieu[100];

float gia;

int namsanxuat;

public:

void nhap()

{

cout<<"nhan hieu:";

fflush(stdin);

gets(nhanhieu);

cout<<"gia:";cin>>gia;

cout<<"nam san xuat: ";cin>>namsanxuat;

}

void xuat()

{

cout<<"

Nhan hieu:"<<nhanhieu;

cout<<"

Gia:"<<gia;

cout<<"

Nam san xuat:"<<namsanxuat;

}

};

class oto:public xe

{

int socho;

float trongtai;

public:

void nhap()

{

cout<<"so cho:";cin>>socho;

cout<<"trong tai:";cin>>trongtai;

xe::nhap();

}

void xuat()

{

cout<<"

So cho:"<<socho;

cout<<"

Trong tai:"<<trongtai;

xe::xuat();

}

};

xe x[100];

main()

{

int i,n;

cout<<"Nhap so o to:";cin>>n;

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

{

x[i].nhap();

}

cout<<"

Danh sach o to vua nhap:";

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

{

x[i].xuat();

}

getch();

}

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Bài 7:

#include<iostream.h>

#include<conio.h>

#include<stdio.h>

class cdcanhac

{

char tendia[25];

float giatien;

public:

int soluongbai;

void nhap()

{

cout<<"Ten dia:";

fflush(stdin);

gets(tendia);

cout<<"So luong bai";cin>>soluongbai;

cout<<"Gia tien";cin>>giatien;

}

void xuat()

{

cout<<"

Ten dia:"<<tendia;

cout<<"

So luong bai:"<<soluongbai;

cout<<"

Gia tien:"<<giatien;

}

};

cdcanhac cd[100];

main()

{

int i,vt,n,max;

cout<<"Nhap so CD ca nhac:";cin>>n;

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

{

cd[i].nhap();

}

max=cd[1].soluongbai;  

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

{

if(cd[i].soluongbai>max)

{

max=cd[i].soluongbai; vt=i;

}

}

cout<<"

CD co so luong bai lon nhat la:";

cd[vt].xuat();

getch();

}

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Bài 8:

#include<iostream.h>

#include<stdio.h>

#include<conio.h>

class vecto

{

int x,y;

public:

friend ostream & operator<<(ostream&,vecto);

friend istream & operator>>(istream&,vecto &);

vecto operator +(vecto);

vecto operator -(vecto);

};

ostream & operator<<(ostream& os,vecto u)

{

os<<"("<<u.x<<","<<u.y<<")"<<endl;

return os;

}

istream & operator>>(istream& is,vecto &u)

{

cout<<"nhap x:";is>>u.x;

cout<<"nhap y:";is>>u.y;

return is;

}

vecto vecto::operator +(vecto v)

{

vecto w;

w.x=x+v.x;

w.y=y+v.y;

return w;

}

vecto vecto::operator -(vecto h)

{

vecto t;

t.x=this->x-h.x;

t.y=this->y-h.y;

return t;

}

int main()

{

vecto a,b,c,d;

cin>>a;cout<<a;

cin>>b;cout<<b;

c=a+b;d=a-b;

cout<<"Ket qua phep cong la:"<<c;

cout<<"

Ket qua phep tru la:"<<d;

getch();

}

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Bài 9:

#include<iostream.h>

#include<conio.h>

#include<stdio.h>

class date

{

int ngay,thang,nam;

public:

void nhap()

{

cout<<"Ngay:";cin>>ngay;

cout<<"Thang:";cin>>thang;

cout<<"Nam: ";cin>>nam;

}

void xuat()

{

cout<<"             "<<ngay<<"/"<<thang<<"/"<<nam;

}

};

class phieunhap:public date

{

char tenhang[25];

public:

int ngaynhap,soluong;

void nhap()

{

cout<<"Ten hang:";

fflush(stdin);

gets(tenhang);

cout<<"So luong:";cin>>soluong;

date::nhap();

}

void xuat()

{

cout<<"

"<<tenhang;

cout<<"           "<<soluong;

date::xuat();

}

};

phieunhap ph[100];

main()

{

int i,j,n;//nv[100];

cout<<"Nhap so phieu nhap:";cin>>n;

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

{

ph[i].nhap();

}

cout<<"

Thong tin phieu nhap hang co so luong >100 la";

cout<<"

+-----------+--------------+-------------+";

cout<<"

Ten hang    |  So luong    |    Ngay nhap";

cout<<"

+-----------+--------------+-------------+";

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

{

if(ph[i].soluong>100)

{

ph[i].xuat();

}

cout<<"

+-----------+--------------+-------------+";

}

getch();

}

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Bài 10:

#include<iostream.h>

#include<conio.h>

#include<stdio.h>

class person

{

char hoten[25],gioitinh[10];

int ngay,thang,nam;

public:

void nhap()

{

cout<<"Ho ten:";

fflush(stdin);

gets(hoten);

cout<<"Gioi tinh:";

gets(gioitinh);

cout<<"Ngay:";cin>>ngay;

cout<<"Thang:";cin>>thang;

cout<<"Nam: ";cin>>nam;

}

void xuat()

{

cout<<"

 "<<hoten;

cout<<"          "<<gioitinh;

cout<<"             "<<ngay<<"/"<<thang<<"/"<<nam;

}

};

class student:public person

{

public:

int lop;

float diemthi;

void nhap()

{

person::nhap();

cout<<"lop";cin>>lop;

cout<<"diemthi";cin>>diemthi;

}

void xuat()

{

person::xuat();

cout<<"         "<<lop;

cout<<"            "<<diemthi;

}

};

student sv[100];

main()

{

int i,n;

cout<<"Nhap so sinh vien:";cin>>n;

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

{

sv[i].nhap();

}

cout<<"

Danh sach sinh vien vua nhap la:";

cout<<"

+-------+--------------+----------------+---------+-------------+";

cout<<"

Ho ten  |   Gioi tinh  |    Ngay sinh    |   Lop     |   Diem thi";

cout<<"

+-------+--------------+----------------+---------+-------------+";

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

{

sv[i].xuat();

cout<<"

+-------+--------------+----------------+---------+-------------+";

}

getch();

}

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