thuật toán quản lý điểm

else if p+i->dTBxepLoai,"Trung binh kha";else if p+i->dTBxepLoai,"Kha"; else if p+i->dTBxepLoai,"Gioi"; else if p+i->dTBxepLoai,"Xuat sac"; } } // In danh sach sinh vien void InDS{ p=a;

http://lap-trinh-may-tinh.blogspot.com/

*/

#include<iostream.h>

#include<conio.h>

#include<stdio.h>

#include<string.h>

#include<stdlib.h>

#include<math.h>

// khai bao

struct SV{

char ht[30], dc[50],gioitinh[3],lop[10],xepLoai[10];

int namSinh;

float dTCC, dTA,dTDC,dTB;

};

SV a[20],*p;

int n;// so sinh vien

// Nhap thong tin sinh vien

void Nhap(){

p=a;

// nhap so sinh vien

do{

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

if(n<2||n>20) cout<<"\n Nhap lai so sinh vien"; }while(n<2||n>20);

// Nhap thong tin sinh vien

cout<<"\n Nhap thong tin sinh vien: ";

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

{

fflush(stdin);

cout<<"\n + Nhap thong tin co sinh vien thu "<<i+1<<": "; cout<<"\n - Ho ten: "; gets((p+i)->ht);

cout<<"\n - Dia chi: "; gets((p+i)->dc);

cout<<"\n - Gioi tinh: "; gets((p+i)->gioitinh);

cout<<"\n - Lop: "; gets((p+i)->lop);

cout<<"\n - Nam sinh: "; cin>>(p+i)->namSinh;

cout<<"\n - Diem toan cao cap: "; cin>>(p+i)->dTCC; cout<<"\n - Diem toan tieng anh: "; cin>>(p+i)->dTA; cout<<"\n - Diem tin dai cuong: "; cin>>(p+i)->dTDC; }

// Tinh diem tong ket

void TinhDiem(){

p=a;

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

(p+i)->dTB=(((p+i)->dTCC)*3+((p+i)->dTA)*4+((p+i)->dTDC)*5)/12; }

// Dem so sinh vien co diem tb>=8

void DemDTB_LonHon8(){

p=a;

int dem=0;

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

if((p+i)->dTB>=8) dem++;

cout<<"\n * So sinh vien co diem trung binh >= 8: "<<dem;

}

// Dem so sinh vien co diem tb<5

void DemDTB_NhoHon5(){

p=a;

int dem=0;

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

if((p+i)->dTB<5) dem++;

cout<<"\n * So sinh vien co diem trung binh < 5: "<<dem;

}

// Tim sinh vien co diem cao nhat

void InSV_max(){

p=a;

float max=p->dTB;

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

if (max<(p+i)->dTB) { max=(p+i)->dTB;}

// in sinh vien max

cout<<"\n * Ten sinh vien co diem cao nhat: ";

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

if(max==(p+i)->dTB) cout<<"\n +"<<(p+i)->ht;

}

// Xep loai cho sinh vien

void XepLoai(){

p=a;

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

{

if ((p+i)->dTB<5) strcpy((p+i)->xepLoai,"Truot");

else if ((p+i)->dTB<6) strcpy((p+i)->xepLoai,"Trung binh");

else if ((p+i)->dTB<7) strcpy((p+i)->xepLoai,"Trung binh kha");

else if ((p+i)->dTB<8) strcpy((p+i)->xepLoai,"Kha");

else if ((p+i)->dTB<9) strcpy((p+i)->xepLoai,"Gioi");

else if ((p+i)->dTB<=10) strcpy((p+i)->xepLoai,"Xuat sac"); }

}

// In danh sach sinh vien

void InDS(){

p=a;

cout<<"\n * In danh sach sinh vien da xep loai:";

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

cout<<"\n - "<<(p+i)->ht<<"\t - "<<(p+i)->xepLoai;

}

// doi cho

void DoiCho(SV *a, SV *b){

char tht[30],tdc[50],tgioitinh[5],tlop[10],dxl[10];

int tns;

float tdtcc,tdta,tdtdc,tdtb;

strcpy(tht,a->ht);

strcpy(a->ht,b->ht);

strcpy(b->ht,tht);

strcpy(tdc,a->dc);

strcpy(a->dc,b->dc);

strcpy(b->dc,tdc);

strcpy(tgioitinh,a->gioitinh);

strcpy(a->gioitinh,b->gioitinh);

strcpy(b->gioitinh,tgioitinh);

strcpy(tlop,a->lop);

strcpy(a->lop,b->lop);

strcpy(b->lop,tlop);

strcpy(dxl,a->xepLoai);

strcpy(a->xepLoai,b->xepLoai);

strcpy(b->xepLoai,dxl);

tns=a->namSinh;

a->namSinh=b->namSinh;

b->namSinh=tns;

tdtcc=a->dTCC;

a->dTCC=b->dTCC;

b->dTCC=tdtcc;

tdta=a->dTA;

a->dTA=b->dTA;

b->dTA=tdta;

tdtdc=a->dTDC;

a->dTDC=b->dTDC;

b->dTDC=tdtdc;

tdtb=a->dTB;

a->dTB=b->dTB;

b->dTB=tdtb;

}

// sap xep danh sach sinh vien

void SapXep(){

p=a;

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

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

{

if ((p+i)->dTB>(p+j)->dTB)

{

DoiCho((p+i),(p+j));

}

}

cout<<"\n * Danh sach sinh vien da xep loai: "; for(i=0;i<n;i++)

cout<<"\n - "<<(p+i)->ht<<"\t - "<<(p+i)->dTB; }

// ham chinh

void main(){

clrscr();

Nhap();

TinhDiem();

DemDTB_LonHon8();

DemDTB_NhoHon5();

InSV_max();

XepLoai();

InDS();

SapXep();

getch(); }