Handle Ctrl+Z & Ctrl+C through Switch Case - C/C++

Description: This code simply is a switch case that handles user inputs & checks it against the switch case. If input isn't matched each of the cases, then it goes to default. The only thing is, my switch case can not handle Ctrl+Z & Ctrl+C.

If user inserts Ctrl+Z, my code ends up in an infinite loop even though i handle it, infinite loop looks as:

Enter a choice: Choice is invalid.

Enter a choice: Choice is invalid.

Enter a choice: Choice is invalid.

Enter a choice: Choice is invalid.

Enter a choice: Choice is invalid.

Enter a choice: Choice is invalid.

Enter a choice: Choice is invalid.

Enter a choice: Choice is invalid.

Enter a choice: Choice is invalid.

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Please look between where i put asterisks.

Question:

1. After user insert data, i do !cin.eof() to prevent Ctrl+Z, if user Ctrl+Z not inserted, then proceed normally & return userChoice. If Ctrl+Z is inserted, return -20(could be any number that is not among one of the cases). When -20 is returned, it will go to receiveUserInput. Thus receiveUserInput carries -20, the switch case should take -20 as a regular user input & checks it against the cases & will end up in default, and repeat the request to user without going to infinite loop! Can you tell me why i end up in infinite loop & how i can fix it?

2. I got some issues with Ctrl+C, i got help before but it did not work. Whenever i press Ctrl+C, i get the image that you see below! I know its not easy to handle Ctrl+C. If you have some good resources to learn from, please refer me to it.

3. Is it possible to handle Ctrl+C through try/catch/throw? Why?

4. Right now, i'm concerned about Ctrl+Z. Ctrl+C is not a big deal for now.

I'm looking forward to hearing from you. Any answer will be appreciated

Code:

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#include <sstream>
#include "MenusLayout.h"
#include "ConsoleDesign.h"
 
const int EXIT = -1;
ConsoleDesign windowDes;
 
MenusLayout::MenusLayout()
{
        //empty constructor
}
 
MenusLayout::~MenusLayout()
{
        //empty destructor
}
 
void MenusLayout::mainMenu()
{
        do
        {
                choice_is_invalid = false;
 
                windowDes.coloringText(3);
                cout<<"\nEnter a choice: ";
                windowDes.coloringText(7);
 
              //*********RETURNED***************//
                int receiveUserInput = getUserChoice<int>();
              //************************************//
 
                switch(receiveUserInput)
                {
                        case 1:
                                //do something
                                break;
                        case 2:
                                //do something
                                break;
                        case 3:
                                //do something
                                break;
                        case EXIT:
                                exitApplication();
                                break;
                        default:
                                windowDes.coloringText(6);
                                cout<<"Choice is invalid."<<endl;
                                choice_is_invalid = true;
                                break;
                }
        }while(choice_is_invalid);
 
}
 
template <typename genericDataType>
genericDataType MenusLayout::getUserChoice()
{
        genericDataType userChoice;
        string input;
 
        getline(cin, input);
        stringstream ss(input);
 
        //**********************************//
        if(!cin.eof())
        {
                ss >> userChoice;
                return userChoice;
        }else{
                return -20;
        }
      //**********************************//
}
 
void MenusLayout::exitApplication()
{
        do
        {
                choice_is_invalid = false;
 
                windowDes.coloringText(12);
                cout<<"\nAre you sure you want to exit - Y/N? ";
 
                char exitConfirmation = getUserChoice<char>();
 
                switch(exitConfirmation)
                {
                        case 'y':
                                exit(0);
                                break;
                        case 'Y':
                                exit(0);
                                break;
                        case 'n':
                                mainMenu();
                                break;
                        case 'N':
                                mainMenu();
                                break;
                        default:
                                windowDes.coloringText(6);
                                cout<<"Choice is invalid - Please enter Y or N"<<endl;
                                choice_is_invalid = true;
                                break;
                }
        }while(choice_is_invalid);
}

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