halp

#include <iostream>

using namespace std;

#include <ctype.h>		// this also has in it to upper and tolower used below
#include <stdlib.h>		// include stdlib.h if you are using exit in the code below

void main ()
	{
	char	Answer;
	int		Num1;
	char	Op;
	bool	ValidOp;

	do	{
		cout << "=> ";
		cin >> Num1;	//	enter first number
		cout << "=> ";
		do	{
			cin >> Op;		//	enter an operator
			switch (Op)		//	check if operator is valid
				{
				case 'X':
				case 'x':		//		turn calculator off
							cout << "Are you sure? ";
							cin >> Answer;
							if (toupper (Answer) == 'Y')
									{
									cout << "Bye" << endl;
									exit (0);	// terminate the program immediately
									}
								else
									{
									ValidOp = false;
									cout << "Another Operator => ";
									break;
									}
				case 'C':
				case 'c':		//		clear (display 0)
							cout << "=> 0" << endl;
				case '+':
				case '-':
				case '*':
				case '/':
							ValidOp = true;
							break;
				default:
							ValidOp = false;
							cout << "Invalid, try again: => ";
				}
			} while (!ValidOp);		//	if not valid go back and read another operator
		} while ();

	//		go back and read a new first number
	}