can't seem to find the error...in the code

[omkarborkar95]

after entering the roll no i have to press enter twice to get the program to ask me for my id.
Why is it happening? I can't see any problem in my code.

  void addstudent()

{

    system("clear");

    

    

    cout << BOLDRED << "A D D   A   S T U D E N T" << RESET << endl;

    cout << BOLDBLACK << "--------------------------------------------------------------------------------" << RESET << endl ;

    cout << RED << "At any time to quit press q and to re enter all the details press r" << RESET << endl << endl;

    

    

    cout << "Name of the student: ";

    getline(cin,st[i].name);

    

    if ( st[i].name == "q" || st[i].name == "Q")

    {

        q();

        mainmenu();

    }

    else if ( st[i].name == "r" || st[i].name == "R")

    {

        r();

        addstudent();

    }

    else

    {

    cout << "Course of the student: ";

    getline(cin,st[i].course);

    

        if (st[i].course == "q" || st[i].course == "Q")

        {

            q();

            mainmenu();

        }

        else if ( st[i].course == "r" || st[i].course == "R")

        {

            r();

            addstudent();

        }

        else

        {

            cout << "Roll No of the student: ";

            getline(cin,st[i].rno);

        

            if (st[i].rno == "q" || st[i].rno == "Q")

            {

                q();

                mainmenu();

            }

            else if ( st[i].rno == "r" || st[i].rno == "R")

            {

                r();

                addstudent();

            }

            else

            {

                cin.ignore();

                cout << "ID of the student: ";

                getline(cin,st[i].id);

                

                if (st[i].id == "q" || st[i].id == "Q")

                {

                    q();

                    mainmenu();

                }

                else if ( st[i].id == "r" || st[i].id == "Q")

                {

                    r();

                    addstudent();

                }

                else

                {

                    cout << "Email id of the student: ";

                    getline(cin,st[i].emailid);

                    

                    if (st[i].emailid == "Q" || st[i].emailid == "q")

                    {

                        q();

                        mainmenu();

                    }

                    else if (st[i].emailid == "r" || st[i].emailid == "R")

                    {

                        r();

                        addstudent();

                    }

                    else

                    {

                        cout << "Contact no of the student: ";

                        getline(cin,st[i].contactno);

                        if (st[i].contactno == "q" || st[i].contactno == "Q")

                        {

                            q();

                            mainmenu();

                        }

                        else if (st[i].contactno == "r" || st[i].contactno == "R")

                        {

                            r();

                            addstudent();

                        }

                    }



                }

            }

        }

    

    }

    

    cout << BOLDBLACK << "--------------------------------------------------------------------------------" << RESET << endl;

    

    

    

    

    // INDIVIDUAL File Creation and initialisation...

    ofstream fout;

    fout.open((st[i].name + extension).c_str(),ios::app);

    

    fout << "Name: " << st[i].name << endl;

    fout << "Course: " << st[i].course << endl;

    fout << "Roll No: " << st[i].rno << endl;

    fout << "Student ID: " << st[i].id << endl;

    fout << "Email ID: " << st[i].emailid << endl;

    fout << "Contact No: " << st[i].contactno << endl;

    fout.close();

    

    fout.open("Students.txt",ios::app);

    fout << "Name: " << st[i].name << endl;

    fout << "Contact No: " << st[i].contactno << endl;

    fout << "------------" << endl;

    fout.close();

    

    

    // Success Message...

    sleep(1);

    i++; // incrementing i for each student added

    cout << BOLDGREEN << "Student Added! " << RESET << endl;

    cout << "Total Students Added: " << BOLDBLACK << i << RESET << endl;

    

    

    

    

    // Exit Menu

    sleep(1);

    studentexit();

}

[omkarborkar95]

The problem was with the cin.ignore(); after entering the roll no.