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| #include <iostream>
#include <stdio.h>
#include <windows.h>
#include <stdlib.h>
#include <conio.h>
#include <iomanip>
#define ENT 13
#define BACK 8
#define ESC 27
using namespace std;
struct exam
{
char exname[40];
unsigned mark;
};
struct student
{
char surname[20], name[20];
unsigned group, course, form;
exam ex[5];
};
void Menu()
{
system("cls");
cout<<"*********************** Ìåíþ ***********************\n";
cout<<"* 1. Ñðåäíèé áàëë îïðåäåëåííîé ãðóïïû ñòóäåíòîâ **\n";
cout<<"* 2. Ñïèñîê íåóñïåâàþùèõ ñòóäåíòîâ **\n";
cout<<"* 3. Ñïèñîê îòëè÷íèêîâ äëÿ êàæäîãî êóðñà **\n";
cout<<"* 4. Ñïèñîê ñòóäåíòîâ íà ïîëó÷åíèå ñòèïåíäèè **\n";
cout<<"* 5. Âûâîä áàçû äàííûõ **\n";
cout<<"* 6. Äîáàâèòü äàííûå â ôàéë **\n";
cout<<"* ESC - âûõîä èç ïðîãðàììû **\n";
cout<<"****************************************************\n";
}
int filemake(int a, char *fname)
{
FILE *fmk;
student stud;
int i, ex(0);
char ch='0';
while(1)
{
system("cls");
cout<<" Enter - ïîäòâåðäèòü\n Backspace - íàçàä";
ch=getch();
switch(ch)
{
case ENT:
system("cls");
ch='0';
if(a==1) fmk=fopen("data.dat", "wb");
else if(a==2) fmk=fopen("created.dat", "wb");
else fmk=fopen(fname, "ab");
while(1)
{
system("cls");
cout<<"Ââåäèòå ôàìèëèþ ñòóäåíòà: ";
cin>>stud.surname;
cout<<"Ââåäèòå èìÿ ñòóäåíòà: ";
cin>>stud.name;
do
{
ex=0;
cout<<"Ââåäèòå íîìåð ãðóïïû: ";
cin.clear();
cin.sync();
cin>>stud.group;
if(cin.fail()||stud.group<0) cout<<"Ââåäåíî íåâåðíîå çíà÷åíèå! \n";
else ex=1;
}
while(ex!=1);
do
{
ex=0;
cout<<"Ââåäèòå íîìåð êóðñà: ";
cin.clear();
cin.sync();
cin>>stud.course;
if(cin.fail()||stud.course<0||stud.course>5) cout<<"Ââåäåíî íåâåðíîå çíà÷åíèå! \n";
else ex=1;
}
while(ex!=1);
for(i=0; i<5; i++)
{
cout<<"Ââåäèòå íàçâàíèå ïðåäìåòà: ";
cin.getline(stud.ex[i].exname, 40);
cin>>stud.ex[i].exname;
do
{
ex=0;
cout<<"Ââåäèòå îöåíêó, ïîëó÷åííóþ ïî ïðåäìåòó \""<<stud.ex[i].exname<<"\" ";
cin.clear();
cin.sync();
cin>>stud.ex[i].mark;
if(stud.ex[i].mark<0||stud.ex[i].mark>5||cin.fail()) cout<<"Ââåäåíî íåâåðíîå çíà÷åíèå! \n";
else ex=1;
}
while(ex!=1);
}
do
{
ex=0;
stud.form=0;
cin.clear();
cin.sync();
cout<<"Âûáåðèòå ôîðìó îáó÷åíèÿ: áþäæåò - 1, âíåáþäæåò - 2: ";
cin>>stud.form;
if(stud.form<1||stud.form>2||cin.fail()) cout<<"Ââåäåíî íåâåðíîå çíà÷åíèå!\n";
else ex=1;
}
while(ex!=1);
fwrite(&stud, sizeof(student), 1, fmk);
ex=0;
while(ex!=1)
{
system("cls");
cout<<"Ââîäèòü åù¸?\n\"Äà\" - Enter\n\"Íåò\" - Backspace\n";
ch=getch();
if(ch==ENT) ex=1;
else if(ch==BACK)
{
if(a==2)
{
system("cls");
cout<<"Çàìåíèòü ñòàðûé ôàéë íà íîâûé?\n\"Äà\" - Enter\n\"Íåò\" - Backspace\n";
ch=getch();
if(ch==ENT)
{
fclose(fmk);
remove("data.dat");
rename("created.dat", "data.dat");
return (2);
}
else if (ch==BACK) return (1);
}
else {fclose(fmk); return (1);}
}
}
}
break;
case BACK: return (0);
}
}
}
/*void sort2(FILE *f, int kolst)
{
const int N=kolst;
fseek(f, 0L, SEEK_SET);
int place, minI, outpr, i, j, I[N], k, pr(0);
student stud, tempst;
for(i=0; i<kolst; i++)
{
minI=i;
for(place=i+1, pr=0; place<kolst; place++)
{
for(k=0; k<i; k++)
if(place==I[k]) pr=1; break;
if(pr==1) break;
fseek(f, place*sizeof(student), SEEK_SET);
fread(&stud, sizeof(student), 1, f);
fseek(f, minI*sizeof(student), SEEK_SET);
fread(&tempst, sizeof(student), 1, f);
if(strcmp(stud.surname, tempst.surname)>0) minI=place;
}
//if(pr==1) continue;
I[i]=minI;
fseek(f, minI*sizeof(student), SEEK_SET);
fread(&tempst, sizeof(student), 1, f);
outpr=0;
for(j=0; j<5; j++)
if((tempst.ex[j].mark<3)&&outpr!=1)
{
cout<<"\nÈìÿ: "<<tempst.name<<endl<<"Ôàìèëèÿ: "<<tempst.surname<<endl<<"Ãðóïïà: "<<tempst.group<<endl<<"Êóðñ: "<<tempst.course<<endl;
cout<<j+1<<". "<<setw(15)<<stud.ex[j].exname<<setw(5)<<" - "<<setw(3)<<stud.ex[j].mark<<endl; outpr=1;
}
else if((tempst.ex[j].mark<3)&&outpr==1)
cout<<j+1<<". "<<setw(15)<<tempst.ex[j].exname<<setw(5)<<" - "<<setw(3)<<tempst.ex[j].mark<<endl;
}
}*/
int main()
{
setlocale(LC_ALL, "Russian");
FILE *f;
char key='0', *fname;
int i, j, file, kolst, kol, kurs, kolstud, kol5, group, pr(0);
float s, summa;
student stud;
while(pr!=1)
{
system("cls");
cout<<"*********************** Ìåíþ ***********************\n1. Èñïîëüçîâàòü ïðåäëîæåííûé ôàéë\n2. Ñîçäàòü ôàéë\n ESC - âûõîä èç ïðîãðàììû";
key=getch();
switch(key)
{
case '1':
key='0';
fname="data.dat";
if((f=fopen(fname, "rb"))!=NULL)
{
pr=1; break;
}
else
{
while(pr!=1)
{
system("cls");
cout<<"Ôàéë íå íàéäåí! Ñîçäàòü íîâûé?\n\"Äà\" - Enter\nÂûõîä èç ïðîãðàììû - ESC";
key=getch();
switch(key)
{
case ENT:
file=filemake(1, fname);
if(file==0) break;
else
{
f=fopen(fname, "rb"); pr=1;
}
break;
case ESC:
return (0);
}
}
}
break;
case '2':
key='0';
file=filemake(2, NULL);
if(file==0) break;
else if(file==1)
{fname="created.dat"; f=fopen(fname, "rb"); pr=1;}
else {fname="data.dat"; f=fopen(fname, "rb"); pr=1;}
break;
case ESC:
return (0);
}
}
do
{
fseek(f, 0L, SEEK_END);
kolst=ftell(f)/sizeof(student);
Menu();
switch (key)
{
case '1':
fseek(f, 0L, SEEK_SET);
kol=0; summa=0; group=0;
do
{
cout<<"Ââåäèòå íîìåð ãðóïïû, äëÿ âûâîäà ñðåäíåãî áàëëà ";
cin>>group;
}
while(group<0);
for(i=0; i<kolst; i++)
{
fread(&stud, sizeof(student), 1, f);
if(stud.group==group)
{
s=0;
kol++;
for(j=0; j<5; j++)
s+=stud.ex[j].mark;
summa+=s;
}
}
if(summa!=0) cout<<"Ñðåäíèé áàëë "<<group<<" ãðóïïû = "<<(float)summa/(kol*5);
else cout<<"Òàêîé ãðóïïû íåò!";
break;
case '2':
sort2(f, kolst);
break;
case '3':
for(kurs=1; kurs!=6; kurs++)
{
fseek(f, 0L, SEEK_SET);
kolstud=0;
kol5=0;
for(i=0; i<kolst; i++)
{
kol=0;
fread(&stud, sizeof(student), 1, f);
if(kurs==stud.course)
{
for(j=0; j<5; j++)
if(stud.ex[j].mark==5) kol++;
else break;
if(kol==5) kol5++;
else kolstud++;
}
}
if(kolstud!=0||kol5!=0)
cout<<"Îòëè÷íèêîâ íà "<<kurs<<" êóðñå - "<<kol5<<", îñòàëüíûõ - "<<kolstud<<", ïðîöåíò îòëè÷íèêîâ "<<(kol5*100)/(kol5+kolstud)<<" %."<<endl;
}
break;
case '4':
fseek(f, 0L, SEEK_SET);
pr=0; kol=0;
cout<<"Ñïèñîê ñòóäåíòîâ íà ïîëó÷åíèå ñòèïåíäèè:\n";
for(i=0; i<kolst; i++)
{
fread(&stud, sizeof(student), 1, f);
for(kol=0, j=0; j<5; j++)
if((stud.ex[j].mark==4||stud.ex[j].mark==5)&&stud.form==1) kol++;
if(kol==5)
{
cout<<"\nÈìÿ: "<<stud.name<<endl<<"Ôàìèëèÿ: "<<stud.surname<<endl<<"Ãðóïïà: "<<stud.group<<endl<<"Êóðñ: "<<stud.course<<endl;
pr=1;
}
}
if(pr==0) cout<<"Ñòóäåíòîâ, êîòîðûå ïîëó÷àþò ñòèïåíäèþ íåò!";
break;
case '5':
fseek(f, 0L, SEEK_SET);
for(i=0; i<kolst; i++)
{
fread(&stud, sizeof(student), 1, f);
cout<<"\nÈìÿ: "<<stud.name<<endl<<"Ôàìèëèÿ: "<<stud.surname<<endl<<"Ãðóïïà: "<<stud.group<<endl<<"Êóðñ: "<<stud.course<<endl;
cout<<"Ôîðìà îáó÷åíèÿ: ";
if(stud.form==1) cout<<"áþäæåò\n";
else cout<<"âíåáþäæåò\n";
cout<<"Ýêçàìåíû:\n";
for(j=0; j<5; j++)
cout<<j+1<<". "<<setw(15)<<stud.ex[j].exname<<setw(5)<<" - "<<setw(3)<<stud.ex[j].mark<<endl;
}
break;
case '6':
filemake(0, fname);
fclose(f);
fopen(fname, "rb");
fseek(f, 0L, SEEK_END);
kolst=ftell(f);
break;
}
}
while ((key=getch())!=ESC);
fclose(f);
return (0);
} |
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