Program we will create complete employee management program with adding records, inserting records at specify position, display record, search records and delete records.
#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
void updateSalary(float s) { salary=s;}
};
//Read employee record
void Employee::read(){
cout<<"Enter employee code: ";
cin>>code;
cout<<"Enter name: ";
cin.ignore(1);
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";
return;
}
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 x;
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\n"<<"4.INCREASE SALARY\n"<<"5.INSERT RECORD\n";
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;
}
Output try your self .
