Small Program To Store Student Information In File In C++

#include<iostream.h>

#include<conio.h>

#include<iomanip.h>

#include<stdio.h>

#include<fstream.h>

#include<string.h>

class stu

{

   char roll[20],name[30];

 public:

   void getstu()

   {

    cout<<"\n\t Enter Roll and Name: ";

    cout<<"\n\t Roll: ";

    cin>>roll;

    cout<<"\n\t Name: ";

    gets(name);

   }

   void putstu()

   {

    cout<<"\n\t Details of Students";

    cout<<"\n"<<setw(15)<<roll;

    cout<<setw(25);

    puts(name);

   }

   void editstu()

   {

    cout<<"\n\t Roll No: "<<roll;;

    cout<<"\n\t Enter Roll and Name: ";

    cout<<"\n\t Roll: ";

    cin>>roll;

    cout<<"\n\t Name: ";

    gets(name);

   }

 void report()

 {cout<<roll<<setw(20)<<name;}

 char* retroll()

 {return roll;}

};

 /*************************************************************************

 /*******************************************************************/

 fstream f1,f2;

 stu s;

 //**********************************************************************

void getdata()

{

 char ch;

 f1.open("stu.dat",ios::out|ios::app);

 do

 {

  clrscr();

  s.getstu();

  f1.write((char *)&s,sizeof(s));

  cout<<"\n\t Do You want to add more record:\n";

  cin>>ch;

 }

 while(ch=='y'||ch=='Y');

 f1.close();

}

 void putdata()

 {

   clrscr();

   f1.open("stu.dat",ios::in);

   if(!f1)

   {

    cout<<"\n\t\t********* Records Are Empty*************\n";

    getch();

    return;

   }

   cout<<"\n====================STUDENT DETAILS==========================";

   cout<<"\n\t************************************************************";

   cout<<"\n\t Roll No."<<setw(20)<<"Name";

   while(f1.read((char *)&s,sizeof(s)));

   {s.report();}

   f1.close();

   cout<<"\n\t Press any key to go back:";

   getch();

 }

void putsdata()

{             char n[15];

 cout<<"\n\t Individual Student Details:\n";

 int flag=0;

f1.open("stu.dat",ios::in);

while(f1.read((char*)&s,sizeof(s)))

{

if((strcmpi(s.retroll(),n)==0))

{

s.putstu();

flag=1;

}

}

f1.close();

if(flag==0)

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

getch();

}

void main()

{

 clrscr();

 char ch;

 cout<<"\n\t\tMake Your Choice\n";

 cout<<"\nPress 1 for Add student:";

 cout<<"\nPress 2 for show all student details:";

 cout<<"\npress 3 for show individual student data: ";

 cout<<"\n\t press any option===> ";

 cin>>ch;

 switch(ch)

 {

  case '1': getdata(); break;

  case '2': putdata(); break;

  case '3': putsdata(); break;

  default: cout<<"poor choice:";

  getch();

 }

}