Function overriding in C++ (basics)

 #include <iostream>

#include <string>

using namespace std;

class student{

      public:

      void displaystu(){

            cout<<"Hi! My name is Vaibhav Yadav and I'm from ECE Department, First Year' 25"<<endl;

      }

};

class update: public student{

      public:

      void displaystu(){

            student::displaystu();

            cout<<"Details UPDATED"<<endl<<"Hi! My name is Vaibhav Yadav and I'm from 'IT' Department, First Year' 25"<<endl;

      }

};

int main()

{

    update up;

    up.displaystu();

    return 0;

}


Program for different levels inheritance is given here

 #include <iostream>

#include <string>

using namespace std;

class College{

      public:

      int Roll_no;

      string Name, Department;

      College(){

            cout<<"This is MMMUT Gorakhpur"<<endl;

      }

};

class student:public College{

      public:

      student(int R, string n, string d){

            Roll_no = R;

            Name = n;

            Department = d;

      }

      void display(){

            cout<<"Student Name is: "<<Name<<endl<<"Roll No: "<<Roll_no<<endl<<"Department: "<<Department<<endl;

      }

      

};





int main()

{

    student stu1(2021071042, "Vaibhav Yadav", "IT");

    stu1.display();

    student stu2(2021071060, "Ayush Verma", "IT");

    stu2.display();

    student stu3(2021071052, "Anurag Kumar Singh", "IT");

    stu3.display();

//     student stu;

    return 0;

}


Program to catch all type of Exceptions in C++

 #include <iostream>

using namespace std;

#include <string>

int main()

{

      string Name = "Vaibhav_Yadav", R_Name;

      int Roll = 2021071042, roll_no;

      cout<<"Authentication Please Verify Yourself"<<endl;

      try{

            cout<<"Enter Your Name: ";

            getline(cin, R_Name);

            cout<<"Enter Your Roll No: ";

            cin>>roll_no;

            if(R_Name == Name && Roll == roll_no){

                  cout<<"Login Success"<<endl;

            }else{

                  throw 401;

            }

      }

      catch(...){

            cout<<"Authentication failed"<<endl;

            cout<<"Access Not Allowed"<<endl;

      }


    return 0;

}


Operator Overloading in C++

#include<iostream> using namespace std; class Complex { private: int real, imag; public: Complex(int r = 0, int i = 0){       re...