#include <iostream>
#include "stdlib.h"
using namespace std;

void runPassword();
double enterTTNum(double &TT);
void menuSelections();
void forLoop();
void precheckLoop();
void postcheckLoop();
void exit();
int main(){
	runPassword();
	return 0;
}
void runPassword(){
	int correct_password = 1998;
	int password = 0;
	int attempt = 1;
	while (attempt <= 3){
		cout << "Enter your password to continue: ";
		cin >> password;
		attempt = attempt + 1;
		if (cin.fail()){
			cin.clear();
			//cin.ignore(INT_MAX, '\n');     Doesnt work.
			cout << "Input Error. Numeric values only!" << endl;
			runPassword();
		}
		else if (password != correct_password) {
			cout << "Incorrect password combination. Please Try again." << "\n";
			//runPassword();
		}
		else
		{
			break;
		}
	}
	if (attempt >= 3){
		if (password == correct_password){
			cout << "Access Granted." << endl;
			system("Pause");
			menuSelections();
		}
		else{
			exit(0);
		}
	}
	else{
		cout << "Access Granted." << endl;
		system("Pause");
		menuSelections();
	}
}
double enterTTNum(double &TT){
	double selection;
	for (int i = 0; i <30; i++){
		cout << "-";
	}
	cout <<"\n"<< "Enter your choice of the time table: " << endl;
	cin >> TT;
	if (cin.fail()){
		cin.clear();
		//cin.ignore(INT_MAX, '\n'
		cout <<"Input Error. Numeric values only." << endl;
		system("pause");
		system("cls");
		enterTTNum(TT);
	}
	else if (TT < 1 || TT>12){
		cout << "Number has to be between 1 and 12" << endl;
		system("pause");
		system("cls");
		enterTTNum(TT);
	}
	else{
		return TT;
	}
	return TT;
}
void menuSelections(){
	int MainMenuOptions;
	do{
		cout << "\n" << "|	Menu Items					|";
		cout << "\n" << "|								|";
		cout << "\n" << "|	1. For Loop (Fixed Loop)	|";
		cout << "\n" << "|	2. While (Pre-Check)		|";
		cout << "\n" << "|	3. Do Loop (Post-Check)		|";
		cout << "\n" << "|								|";
		cout << "\n" << "|	0. Exit Program				|";
		cout << "\n" << "|								|";
		for (int i = 0; i < 30; ++i){
			cout << "-";
		}
		cout << "\n" << "Please select an option: ";
		cin >> MainMenuOptions;
		if (cin.fail()){
			cin.clear();
			//cin.ignore(INT_MAX, '\n'
			cout << "Input Error, Numeric values only." << endl;
			system("pause");
			system("cls");
			menuSelections();
		}
		else{
			switch (MainMenuOptions){
				case 1:
					forLoop();
					break;
				case 2:
					precheckLoop();
					break;
				case 3:
					postcheckLoop();
					break;
				case 0:
					exit();
					break;
				default:
					cout << "\n" << "Invalid Option entered" << "\n";
					system("pause");
					system("cls");
					menuSelections();
					break;
			}
		}
	} while (MainMenuOptions != 1 && MainMenuOptions != 2 && MainMenuOptions != 3 && MainMenuOptions !=0);
}
void forLoop(){
	int Answer;
	double TT = 0;
	enterTTNum(TT);
	for (int i = 1; i < 12; i++){
		Answer = TT * i;
		cout << TT << " * " << i << " = " << Answer << endl;
	}
	system("pause");
	exit();
}
void precheckLoop(){
	int Answer;
	double TT=0;
	enterTTNum(TT);
	int i = 0;
	while ( i < 12){
		i = i + 1;
		Answer + TT * i;
		cout << TT << " * " << i << " = " << Answer << endl;
	}
	system("pause");
	exit();
}
void postcheckLoop(){
	int Answer;
	double TT;
	enterTTNum(TT);
	int i = 0;
	do{
		i = i + 1;
		Answer = TT * i;
		cout << TT << " * " << i << " * " << Answer << endl;
	} while (i < 12);
	system("pause");
	exit();
}
void exit(){
	char choice;
	cout << "\n\n\n" << "Do you want to run the program again? (Y or N): ";
	cin >> choice;
	if (choice == 'Y' || choice == 'y'){
		system("cls");
		menuSelections();
	}
	else if (choice == 'N' || choice == 'n'){
		exit(0);
	}
	else{
		cout << "\n" << "Invalid letter. Only accept Y or N" << "\n";
		exit();
	}
}