//Employee management File Handling Program

#include<iostream>

#include<fstream>

#include<stdio.h>

using namespace std;

//Employee class Declaration

class Employee

private:

int code;

char name[20];

float salary;

public:

void read();

void display();

//will return employee code

int getEmpCode()

return code;

//will return employee salary

int getSalary()

return salary;

//will update employee salary

salary=s;

};

//Read employee record

void Employee::read()

cout<<"Enter employee code: ";

cin>>code;

cout<<"Enter name: ";

cin.ignore(1);//The cin.ignore() function is used which is used to ignore or clear

//one or more characters from the input buffer.

cin.getline(name,20);

cout<<"Enter salary: ";

cin>>salary;

//Display employee record

void Employee::display()

cout<<code<<" "<<name<<"\t"<<salary<<endl;

//global declaration

fstream file;

//Will delete file when program is being executed

//because we are create file in append mode

void deleteExistingFile()

{
 remove("EMPLOYEE.DAT");

//function to append record into file

void appendToFille()

Employee x;

//Read employee record from user

x.read();

file.open("EMPLOYEE.DAT",ios::binary|ios::app);

if(!file)

cout<<"ERROR IN CREATING FILE\n";

return;

//write into file

file.write((char*)&x,sizeof(x));

file.close();

cout<<"Record added sucessfully.\n";

void displayAll()

Employee x;

file.open("EMPLOYEE.DAT",ios::binary|ios::in);

if(!file)

cout<<"ERROR IN OPENING FILE \n";

while(file)

if(file.read((char*)&x,sizeof(x)))

if(x.getSalary()>=10000 && x.getSalary()<=20000)

x.display();

file.close();

void searchForRecord()

//read employee id

Employee x;

int c;

int isFound=0;

cout<<"Enter employee code: ";

cin>>c;

file.open("EMPLOYEE.DAT",ios::binary|ios::in);

if(!file)

cout<<"ERROR IN OPENING FILE \n";

return;

while(file)

if(file.read((char*)&x,sizeof(x)))

{
 if(x.getEmpCode()==c)

cout<<"RECORD FOUND\n";

x.display();

isFound=1;

break;

if(isFound==0)

cout<<"Record not found!!!\n";

file.close();

//Function to increase salary

void increaseSalary()

//read employee id

Employee x;

int c;

int isFound=0;

float sal;

cout<<"enter employee code \n";

cin>>c;

file.open("EMPLOYEE.DAT",ios::binary|ios::in);

if(!file)

{
 cout<<"ERROR IN OPENING FILE \n";

return;

while(file)

if(file.read((char*)&x,sizeof(x)))

if(x.getEmpCode()==c)

cout<<"Salary hike? ";

cin>>sal;

x.updateSalary(x.getSalary()+sal);

isFound=1;

break;

if(isFound==0)

cout<<"Record not found!!!\n";

file.close();

cout<<"Salary updated successfully."<<endl;

//Insert record by assuming that records are in

//ascending order

void insertRecord()

//read employee record

Employee newEmp;

//Read record to insert

newEmp.read();

fstream fin;

//read file in input mode

file.open("EMPLOYEE.DAT",ios::binary|ios::in);

//open file in write mode

fin.open("TEMP.DAT",ios::binary|ios::out);

if(!file)

cout<<"Error in opening EMPLOYEE.DAT file!!!\n";

return;

if(!fin)

cout<<"Error in opening TEMP.DAT file!!!\n";

return;

while(file)

if(file.read((char*)&x,sizeof(x)))

if(x.getEmpCode()>newEmp.getEmpCode())

fin.write((char*)&newEmp, sizeof(newEmp));
 }

//no need to use else

fin.write((char*)&x, sizeof(x));

fin.close();

file.close();

rename("TEMP.DAT","EMPLOYEE.DAT");

remove("TEMP.DAT");

cout<<"Record inserted successfully."<<endl;

int main()

char ch;

//if required then only remove the file

deleteExistingFile();

do

int n;

cout<<"ENTER CHOICE\n"<<"1.ADD AN EMPLOYEE\n"<<"2.DISPLAY\n"<<"3.SEARCH\

cout<<"Make a choice: ";

cin>>n;

switch(n)
 {

case 1:

appendToFille();

break;

case 2 :

displayAll();

break;

case 3:

searchForRecord();

break;

case 4:

increaseSalary();

break;

case 5:

insertRecord();

break;

default :

cout<<"Invalid Choice\n";

cout<<"Do you want to continue ? : ";

cin>>ch;

}while(ch=='Y'||ch=='y');

return 0;