Bài tập Class trong C++

HuanBuiThanh

 




#include <iostream>

#include <iomanip>

#include <conio.h> 

using namespace std;


class SINHVIEN

{

protected:

char masv[10], hoten[25], khoa[10];

float T_Anh, Tin_CS;

public:

void NHAP();

void INRA();

};


class SV_TOAN : public SINHVIEN

{

protected:

float Giai_tich, Dai_so;

public:

void NHAP_SV_TOAN();

void INRA_SV_TOAN();

double DTB_SV_TOAN();

};


class SV_TIN : public SINHVIEN

{

protected:

float NN_C, CT_DL;

public:

void NHAP_SV_TIN();

void INRA_SV_TIN();

double DTB_SV_TIN();

};


void SINHVIEN::NHAP()

{

cout << "So bao danh: "; cin.getline(masv, 10);

cout << "Ho va ten  : "; cin.getline(hoten, 25);

cout << "Khoa hoc   : "; cin.getline(khoa, 10);

cout << "Diem : T_Anh, Tin_CS; ";

cin >> T_Anh >> Tin_CS; cin.ignore();

}


void SINHVIEN::INRA()

{

cout << setw(10) << masv << setw(25) << hoten

<< setw(10) << khoa << setw(10)

<< setw(5) << T_Anh << setw(5) << Tin_CS;

}


void SV_TOAN::NHAP_SV_TOAN()

{

NHAP();

cout << " Giai Tich: ";

cin >> Giai_tich; cin.ignore();

cout << "Dai so: ";

cin >> Dai_so; cin.ignore();

}


void SV_TOAN::INRA_SV_TOAN()

{

INRA();

cout << setw(5) << Giai_tich << setw(5) << Dai_so

<< setw(10) << DTB_SV_TOAN() << "\n";

}


double SV_TOAN::DTB_SV_TOAN()

{

return (T_Anh + Tin_CS + Giai_tich + Dai_so ) / 4.0;

}


void SV_TIN::NHAP_SV_TIN()

{

NHAP();

cout << "Diem Ngon ngu C : ";

cin >> NN_C; cin.ignore();

cout << " Cau Truc Du Lieu: ";

cin >> CT_DL;

}


void SV_TIN::INRA_SV_TIN()

{

INRA();

cout << setw(5) << NN_C << setw(5) << CT_DL

<< setw(10) << DTB_SV_TIN() << "\n";

}


double SV_TIN::DTB_SV_TIN()

{

return (T_Anh + Tin_CS + NN_C + CT_DL) / 4.0;

}


class DS_SV_TOAN

{

SV_TOAN P[100];

int i = 0;


public:

void NHAP_DANHSACH()

{

char ok;

while (i < 100)

{

P[i].NHAP_SV_TOAN();

i++;


cout << "\nNhap nua khong (C/K): ";

cin >> ok; cin.ignore();

if (ok == 'k' || ok == 'K') break;

}

}


void IN_DANHSACH()

{

cout << "\n\t\tDANH SACH SINH VIEN LOP TOAN\n";

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

P[j].INRA_SV_TOAN();

}


int SOSV_TOAN7()

{

int s = 0;

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

if (P[j].DTB_SV_TOAN() >= 7) s++;

return s;

}

};


class DS_SV_TIN

{

SV_TIN P[100];

int i = 0;


public:

void NHAP_DANHSACH()

{

char ok;

while (i < 100)

{

P[i].NHAP_SV_TIN();

i++;


cout << "\nNhap nua khong (C/K): ";

cin >> ok; cin.ignore();

if (ok == 'k' || ok == 'K') break;

}

}


void IN_DANHSACH()

{

cout << "\n\t\tDANH SACH SINH VIEN LOP TIN\n";

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

P[j].INRA_SV_TIN();

}


int SOSV_TIN7()

{

int s = 0;

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

if (P[j].DTB_SV_TIN() >= 7) s++;

return s;

}

};


int main()

{

cout << "\nNhap thong tin sinh vien mon Toan: "<<endl;

DS_SV_TOAN svtoan;

svtoan.NHAP_DANHSACH();

svtoan.IN_DANHSACH();

cout << "\nSo SV Toan co diem trung binh lon hon 7 la: " << svtoan.SOSV_TOAN7();


cout << "\nNhap thong tin sinh vien mon Tin: "<<endl;

DS_SV_TIN svtin;

svtin.NHAP_DANHSACH();

svtin.IN_DANHSACH();

cout << "\nSo SV Toan co diem trung binh lon hon 7 la: " << svtin.SOSV_TIN7();


}


Getting Info...

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