Input file Writing and Reading in C++

 #include <iostream>

#include  <bits/stdc++.h>

#include <fstream>

#include <string>

using namespace std;

int main()

{

      while(1){

            int ch;

      cout<<endl;

      cout<<"Enter Your Choice: "<<endl;

      cout<<"1. Write Into file"<<endl;

      cout<<"2. Read From The file"<<endl;

      cin>>ch;

      switch(ch){

            case 1:{

            string Inputline;

            cout<<"Enter What you want to insert to file"<<endl;

            cout<<"Default Input will be 'This is Vaibhav Yadav and today I'm learning file handling in c++ with fstream'"<<endl;

            // getline(cin, Inputline);

            Inputline = "This is Vaibhav Yadav and today I'm learning file handling in c++ with fstream";

            ofstream W_myfile("Name.txt");

            W_myfile<<Inputline;

            W_myfile.close();

            }

            break;

            

            case 2:    

            {

            string NameTxt;

            ifstream R_myfile("Name.txt");

            while(getline(R_myfile, NameTxt)){

            cout<<NameTxt;

            }

            R_myfile.close();

            }

            break;

            

            default:

            cout<<"Wrong Input Yrr :("<<endl;

            

      }

      }

    return 0;

}

Class Constructor and Destructor for this Class

 #include<iostream>

using namespace std;

class Student

{

string name;

public:

Student(){

    name = "Vaibhav Yadav";

    cout<<"Constructor of Student Class has been Called"<<endl;

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

}

~Student(){

    cout<<"---Destructor Of Student Class has been called---"<<endl;

    cout<<"---Memory for 'obj name' has been deallocated and memory has been released---"<<endl;

}

};

main()

{

Student stu;

return 0;

}

Program to demonstrate the friend function and friend class in c++

 #include<iostream>

using namespace std;

class Student

{

string Stu_name = "Vaibhav Yadav";

string branch = "Information Technology";

friend class MMMUT;

friend void studisplay(Student);

};

void studisplay(Student t){

    cout<<endl<<"Student branch is: "<<t.branch;

}

class MMMUT

{

public:

void display(Student t)

{

cout<<endl<<"Student Name is: "<<t.Stu_name;

}

};

main()

{

Student stu;

MMMUT clgstu;

clgstu.display(stu);

studisplay(stu);

return 0;

}