binary file handling by tarun

 #include <iostream>

#include <fstream>

using namespace std;

class student

{

public:

    int roll;

    string name;

    void getdata()

    {

        cout << "ENTER ROLL NO : " << endl;

        cin >> roll;

        cout << "ENTER NAME : " << endl;

        cin >> name;

    }

    void display()

    {

        cout << "YOUR ROLL NUMBER IS : " << roll << endl;

        cout << "YOUR NAME IS : " << name << endl;

    }

};

int main()

{

    student obj;

    ofstream binfile;

    binfile.open("bin.dat", ios::binary); // opened file in binary mode

    for (int i = 0; i < 3; i++)

    {

        obj.getdata();

        binfile.write((char *)&obj, sizeof(obj)); // writing data in binary file taking the reference of the data stored in

        // object of student class

    }

    binfile.close();

    // now for showing the data that is stored in binaryfile we create ifstream

    ifstream binfile2;

    binfile2.open("bin.dat", ios::binary);

    while (binfile2.read((char *)&obj, sizeof(obj))) // while read() is reading from the binaryfile it is true

    {

        obj.display();

    }

    binfile2.close();

    return 0;

}