File Handling OOP

#include<iostream>
#include<fstream>
using namespace std;

class emp{
string empid;
string name;

public:
emp()
{
    empid = "0";
    name = "abc";
}

void accept()
{
    cout<< "Enter employee details" << endl;
    cout << "Enter employee id: " << endl;
    cin >> empid;
    cout << "Enter employee name: " << endl;
    cin >> name;
}

void display()
{
    cout << "Employee ID: " << empid << endl;
    cout << "Employee name: " << name << endl;
}
};

int main()
{
    emp e1,e2;
    fstream file;
    int ch = 10;
    while(ch != 0){
        cout << "Enter your choices: " << endl;
        cout << "1: Write in file" << endl;
        cout << "2: Read from file" << endl;
        cout << "0: Exit" << endl;
        cin >> ch;
        switch(ch){
            case 1:
            file.open("/workspaces/codespaces-blank/DATA");
            e1.accept();
            file.write((char*)&e1,sizeof(e1));
            file.close();
            break;
            case 2:
            file.open("/workspaces/codespaces-blank/DATA");
            file.read((char*)&e1,sizeof(e1));
            e1.display();
            file.close();
            break;
        }
    }
    return 0;
}