AIM:Write a C++ program that creates an output file, writes information to it, closes the file and open it again as an input file and read the information from the file

CODING:

#include<fstream.h>

#include<conio.h>

class student

{

   char name[20];

   int roll;

   public:

     void getdata()

     {  cout<<"Enter Name:"<<endl;

            cin>>name;

            cout<<"Enter roll No:"<<endl;

            cin>>roll;

     }

       void showdata()

       { cout<<"Name is:"<<name<<endl;

             cout<<"Roll No is"<<roll<<endl;

            }

};

main()

{  clrscr();

   student s[2];

   ofstream of;

   of.open("student.txt");

   for(int i=0;i<2;i++)

   {

     s[i].getdata();

     of.write((char *)&s[i],sizeof(s[i]));

     of.close();

   }

   ifstream fin;

   fin.open("student.txt");

   for(i=0;i<2;i++)

   {

     fin.read((char *)&s[i],sizeof(s[i]));

     s[i].showdata();

     fin.close();

   }

   getch();

   return 0;

}