#include <iostream>
#include <string>
#include <stdlib.h> 

/*
 * Created by Drake Vidkjer
 * Created on 10/8/15
 * Modified on 10/9/15
 * Version .1
 * Take in a number and convert it into another base
 */
 
using namespace std;

int main()
{
	//define variables
	string input;
	string base;
	bool inGood = false;
	bool cont = true;
	int num;
	
	while(cont == true) 
	{
		//reset all variables used
		inGood = false;
		num = -1;
		base = "";
		input = "";
	
		//loop until th number entered is valid
		while(inGood == false)
		{	
			//ask user for input and take in
			cout << dec << "Enter a number 0-15: ";
			cin >> input;
		
			//check that input
			if(input.size() == 2)
			{
				if(input.at(0) < 48 || input.at(0) > 57)
				{
					//tell user bad input
					cout << "Bad input, try again" << endl;
				}
				else if(input.at(1) < 48 || input.at(1) > 57)
				{
					//tell user bad input
					cout << "Bad input, try again" << endl;
				}
				else
				{
					//cast number to int and check
					num = atoi(input.c_str());
					if(num >= 0 && num <= 15)
					{
						inGood = true;
					}
				}
			}
		
		else if(input.size() == 1)
		{
			if(input.at(0) < 48 || input.at(0) > 57)
			{
				//tell user bad input
				cout << "Bad input, try again" << endl;
			}
			else
			{
				//cast number to int and check
				num = atoi(input.c_str());
				if(num >= 0 && num <= 15)
				{
					inGood = true;
				}
				
			}
		}
		
		else if(input.size() >= 3)
		{
			//tell user bad input
			cout << "Bad input, try again" << endl;
		}
	}
	
	//loop until user tells us what base to put number into
	while(base != "b" && base != "h" && base != "o")
	{
		//ask user what to do
		cout << "What base do you want to convert into? Binary (b), Hexadecimal (h), or Octal (o) ";
		cin >> base;

		//tell user if input was bad
		//if(base != "B" || base != "H" || base != "O")
		//{
		//	cout << "Invalid input, try again" << endl;
		//}
	}
	
	//convert number
	if(base == "b")
	{
		//cout << num << " in binary is " << bin << num << endl;
		cout << num/8;
        num = num - (num/8) * 8;

        cout << num/4;
        num = num - (num/4) * 4;

        cout << num/2;
        num = num - (num/2) * 2;

        cout << num/1 << endl;
        num = num - (num/1) * 1;

	}
	else if(base == "h")
	{
		cout << num << " in hexadecimal is " << hex << num << endl;
	}
	else if(base == "o")
	{
		cout << num << " in octal is " << oct << num << endl;
	}
	else 
	{
		cout << "something went wrong :(" << endl;
		return 0;
	}
	
	//check if user wants to enter new number
	while((input != "y") && (input != "n"))
	{
		cout << "Would you like to convert another number? (y/n): ";
		cin >> input;
	}
	
	if(input == "y")
	{
		cont = true;
	}
	else if (input == "n")
	{
		cont = false;
	}
	else
	{
		cout << "something went wrong :(" << endl;
		return 0;
	}
	}
}