Bai 22

//Tinh diem cua sinh vien

#include <iostream>

#include <string.h>

using namespace std;

//Khai bao lop sinh vien

class SinhVien

{

private:

char hoten[40],ns[12],lop[11];

float dccan,dktra,dthi,dmhoc;

public:

void nhap();

const char* getHoten();

const char* getTen();

const char* getNS();

const char* getLop();

float getDiemMH();

};

//========CHUONG TRINH CHINH===========

int main()

{

SinhVien ds[100];

SinhVien tg;

int n,i,j;

cout<<"So sinh vien can nhap? ";cin>>n;cin.ignore();

cout<<"Nhap du lieu cho cac sinh vien:

";

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

{

cout<<"Sinh vien thu "<<(i+1)<<":

"; ds[i].nhap();

}

//Sap xep danh sach sinh vien

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

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

if(strcmp(ds[j].getTen(),ds[i].getTen())<0)

{

tg=ds[i];ds[i]=ds[j];ds[j]=tg;

}

//Dua ra man hinh cac sinh vien co diem < 5

cout<<"\t\tDANH SACH SINH VIEN CO DIEM <5

";

cout.setf(ios::left);cout.precision(2);

cout.width(5);cout<<"STT";

cout.width(25);cout<<"Ho va ten";

cout.width(12);cout<<"Ngay sinh";

cout.width(10);cout<<"Lop";

cout.width(8);cout<<"DiemMH";

cout<<endl;

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

if(ds[i].getDiemMH()<5)

{

cout.width(5);cout<<(i+1);

cout.width(25);cout<<ds[i].getHoten();

cout.width(12);cout<<ds[i].getNS();

cout.width(10);cout<<ds[i].getLop();

cout.width(8);cout<<ds[i].getDiemMH();

cout<<endl;

}

cout.precision(0);

return 0;

//cout<<"\t}

//=====Dinh nghia cac ham======

void SinhVien::nhap()

{

cout<<"\tHo ten: ";cin.get(hoten,sizeof(hoten));cin.ignore();

cout<<"\tNgay sinh: ";cin.get(ns,sizeof(ns));cin.ignore();

cout<<"\tLop: ";cin.get(lop,sizeof(lop));cin.ignore();

cout<<"\tDiem CCan: ";cin>>dccan;cin.ignore();

cout<<"\tDiem KTra: ";cin>>dktra;cin.ignore();

cout<<"\tDiem Thi: ";cin>>dthi;cin.ignore();

dmhoc=0.1*dccan+0.3*dktra+0.6*dthi;

}

//----------------------

const char* SinhVien::getHoten()

{

return hoten;

}

//----------------------

const char* SinhVien::getTen()

{

char* p;

p=hoten; //Cho p tro vao dau xau ky tu

p=p+strlen(hoten)-1; //Cho p tro vao cuoi xau ky tu

while(*p!=' ') p--; //Tim ky tu cach

p++; //cho p tro vao ky tu dau tien cua ten

return p; //Tra ve ten

}

//-----------------------

const char* SinhVien::getNS()

{

return ns;

}

//-----------------------

const char* SinhVien::getLop()

{

return lop;

}

//-----------------------

float SinhVien::getDiemMH()

{

return dmhoc;

}