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Displaying Source Code(s)
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Employee Management Database System
--------------------------------------------------------------------------------
Description : It is basic program that deals with how to manage
a database using C++ library functions.
#include<fstream.h>
#include<dos.h>
#include<conio.h>
#include<stdlib.h>
#include<stdio.h>
#include<string.h>
#include<iomanip.h>
#include<graphics.h>
class group
{
private:
struct person
{
char flag;
char empcode[5];
char name[40];
int age;
float sal;
int day;
int month;
int year;
}p;
fstream file;
public:
group();
void addrec();
void listrec();
void modirec();
void delrec();
void recallrec();
void packrec();
void exit();
};
void main()
{
char choice,v;
group g;
do
{
clrscr();
struct dosdate_t d;
_dos_getdate(&d);
// p.day=d.day;
// p.month=d.month;
// p.year=d.year;
// _dos_getdate(&d);
gotoxy(12,5);
textcolor(6);
cprintf("Todays date:");
printf("%d",d.day);
cout<<"/";
printf("%d",d.month);
cout<<"/";
cout<<d.year;
gotoxy(12,9);
cout<<"Srknec.corporation pvt.ltd";
gotoxy(12,12);
cout<<"1.Add record";
gotoxy(12,15);
cout<<"2.List Record";
gotoxy(12,17);
cout<<"3.Modify record";
gotoxy(12,19);
cout<<"4.Delete record";
gotoxy(12,21);
cout<<"5.Recall record";
gotoxy(12,23);
cout<<"6.Pack record";
gotoxy(12,25);
cout<<"0.Exit";
gotoxy(12,28);
cout<<"Your choice"<<" ";
cin>>choice;
clrscr();
switch(choice)
{
case '1':
g.addrec();
break;
case'2':
g.listrec();
break;
case'3':
g.modirec();
break;
case'4':
g.delrec();
break;
case'5':
g.recallrec();
break;
case'6':
g.packrec();
break;
case'0':
g.exit();
exit(1);
}
}
while(choice!=0);
}
void group::group()
{
file.open("Emp.dat",ios::binary|ios::in|ios::out);
p.flag=' ';
if(!file)
{
cout<<endl<<"Unable to open file";
exit();
}
}
void group::addrec()
{
char ch;
file.seekp(0L,ios::end);
struct dosdate_t d;
_dos_getdate(&d);
p.day=d.day;
p.month=d.month;
p.year=d.year;
cout<<"Make shure that no employee has the same code"<<endl;
do
{
cout<<endl<<"Enter employee code, name, age & salary
:"<<endl<<endl;
cout<<"OR"<<endl<<endl;
cout<<"To return to the Main menu press'm' key else press'a':";
cin>>ch;
if(ch=='m'||ch=='M')
{
main();
}
cin>>p.empcode>>p.name>>p.age>>p.sal;
p.flag=' ';
file.write((char*)&p,sizeof(p));
cout<<"Add another record ?(y/n) :";
cin>>ch;
}
while(ch=='y'||ch=='Y');
}
void group::listrec()
{
int j=0,a;
file.seekg(0L,ios::beg);
cout<<"List of records present are as under>>>"<<endl<<endl;
cout<<" "<<"|CODE|"<<" "<<"|NAME|"<<"<BR><<"|AGE|"<<"
"<<"|SALARY|"<<" "<<"|DATED|"<<endl;
//Donot touch Above Line Any Way it is set to give Some Nice
Look
while(file.read((char*)&p,sizeof(p)))
{
if(p.flag!='*')
cout<<endl<<"Record#"<<"<BR><<j++<<setw(6)<<p.empcode<<setw(20)<<p.name<<setw(4)<<p.age<<setw(9)<<p.sal<<"
"<<p.day<<"/"<<p.month<<"/"<<p.year<<endl;
}
file.clear();
if(j==0)
{
gotoxy(10,10);
cout<<"No record exit";
gotoxy(10,11);
cout<<"Press any key...";
getch();
}
else
{
cout<<endl<<"Press any key...";
getch();
}
}
void group::modirec()
{
char code[5];
int count=0;
long int pos;
cout<<"Enter employee code whose record is to be modified :";
cin>>code;
file.seekg(0L,ios::beg);
while(file.read((char*)&p,sizeof(p)))
{
if(strcmp(p.empcode,code)==0)
{
cout<<endl<<"Enter new record "<<endl;
cout<<endl<<"Enter employee name,age & salary :"<<endl;
cin>>p.name>>p.age>>p.sal;
struct dosdate_t d;
_dos_getdate(&d);
p.day=d.day;
p.month=d.month;
p.year=d.year;
p.flag=' ';
pos=count*sizeof(p);
file.seekp(pos,ios::beg);
file.write((char*)&p,sizeof(p));
return;
}
count++;
}
cout<<endl<<"No employee in file with code= "<<code;
getch();
file.clear();
}
void group::delrec()
{
char code[5];
long int pos;
int count=0;
cout<<"Enter employee code to be deleted :";
cin>>code;
file.seekg(0L,ios::beg);
while(file.read((char*)&p,sizeof(p)))
{
if (strcmp(p.empcode,code)==0)
{
p.flag='*';
pos=count*sizeof(p);
file.seekp(pos,ios::beg);
file.write((char*)&p,sizeof(p));
return;
}
count++;
}
cout<<endl<<"No employee in file with code="<<code;
cout<<endl<<"Press any key...";
getch();
file.clear();
}
void group::recallrec()
{
char code[5];
long int pos;
int count=0;
cout<<"Enter employee code to be recalled :";
cin>>code;
file.seekg(0L,ios::beg);
while(file.read((char*)&p,sizeof(p)))
{
if(strcmp(p.empcode,code)==0)
{
p.flag=' ';
pos=count*sizeof(p);
file.seekp(pos,ios::beg);
file.write((char*)&p,sizeof(p));
return;
}
count++;
}
cout<<endl<<"No employee in the file with code="<<code;
cout<<endl<<"Press any key...";
getch();
file.clear();
}
void group::packrec()
{
ofstream outfile;
outfile.open("TEMP",ios::out);
file.seekg(0,ios::beg);
while(file.read((char*)&p,sizeof(p)))
{
if(p.flag!='*')
outfile.write((char*)&p,sizeof(p));
}
outfile.close();
file.close();
remove("Emp.DAT");
rename("TEMP","EMP.DAT");
file.open("EMP.DAT",ios::binary|ios::in|ios::out|ios::nocreate);
gotoxy(10,10);
cout<<"Marked records to be deleted are all removed";
gotoxy(10,11);
cout<<"press any key....";
getch();
}
void group::exit()
{
file.close();
}
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123
Eng