#include<iostream>

using namespace std;

class student

{

        private:

                        char name[20],regd[10],branch[10];

                        int sem;

        public:

                void input();

                void display();

};

void student::input()

{

        cout<<"Enter Name:";

        cin>>name;

        cout<<"Enter Regdno.:";

        cin>>regd;

        cout<<"Enter Branch:";

        cin>>branch;

        cout<<"Enter Sem:";

        cin>>sem;

}

void student::display()

{

        cout<<"\nName:"<<name;

        cout<<"\nRegdno.:"<<regd;

        cout<<"\nBranch:"<<branch;

        cout<<"\nSem:"<<sem;

}

int main()

{

        student s;

        s.input();

        s.display();

}

using System;

​

class Program

{

    static void Main(string[] args)

    {

        Console.WriteLine("Hello World!");

    }

}

You typed to many # like myself.