#include <iostream>
#include <iomanip>
#include <cstring>
using namespace std;

const int TENS = 20;

char words[30][10] = {"zero", "one", "two", "three", "four", "five", "six", "seven",
		"eight", "nine", "ten", "eleven", "twelve", "thirteen", "fourteen", "fifteen",
	"sixteen", "seventeen", "eighteen", "nineteen", "", "", "twenty", "thirty", "forty", 
	"fifty", "sixty", "seventy", "eighty", "ninety"};

char *Digit (int num)
{	if (num > 0) 
		return words[num-1];
	else return "";
}

void GetDigits (int number, int &thousands, int &hundreds, int &tens, int &ones)
{	thousands = number/1000;
	number -= (thousands*1000);
	hundreds = number/100;
	number -= (hundreds*100);
	tens = number/10;
	number -= (tens*10);
	ones = number;
	if (tens == 1)				// teens are considered part of the one's place
	{	ones = tens*10+ones;
		tens = 0;
	}
}

char *Phrase (int thousands, int hundreds, int tens, int ones)
{	char *text = new char[100];
	*text = '\0';					// initialize the string to empty
	if (thousands)
	{	strcat (text, words[thousands]);
		strcat (text, " thousand ");
	}
	if (hundreds)
	{	strcat (text, words[hundreds]);
		strcat (text, " hundred ");
	}
	if (tens)
	{	strcat (text, words[tens+TENS]);
		strcat (text, " ");
	}
	if (ones)
	{	strcat (text, words[ones]);
	}
	return text;
}

int main()
{	char *first, *second, *sum;
	int number1, number2, add, thousands, hundreds, tens, ones;
	while (1)
	{	cout << "Enter two numbers (no commas or $): ";
		cin >> number1 >>  number2;
		GetDigits (number1, thousands, hundreds, tens, ones);
		first = Phrase(thousands, hundreds, tens, ones);
		GetDigits (number2, thousands, hundreds, tens, ones);
		second = Phrase(thousands, hundreds, tens, ones);
		add = number1 + number2;
		GetDigits (add, thousands, hundreds, tens, ones);
		sum = Phrase (thousands, hundreds, tens, ones);
		cout << first << endl;
		cout << "PLUS \n";
		cout << second << endl;
		cout << "EQUALS \n";
		cout << sum << endl;
	}
}