Program 7

BINARY FILE HANDLING - I

Write a program to search for a particular record in a existing file “empf.dat”.

#include<fstream.h>

#include<conio.h>

class employee

{

public:

int empno;

char name[20];

float salary;

void getdata()

{

cout<<"\n enter employee no : ";

cin>>empno;

cout<<"\n enter name : ";

cin>>name;

cout<<"\n enter salary : ";

cin>>salary;

}

void showdata()

{

cout<<empno<<"\t";

cout<<name<<"\t";

cout<<salary<<"\n";

}

};

void main()

{

employee emp;

fstream fin("empf.dat",ios::binary|ios::in);

if(fin=="null")

{

cout<<"\n file does not exist";

return;

}

cout<<"\n search for which emp no?";

int eno;

cin>>eno;

while(fin.read((char*)&emp,sizeof(emp)))

{

if(eno==emp.empno)

{

cout<<"\n employee details are : ";

emp.showdata();

break;

}

}

getch();

}