Print name of numbers

#include <iostream>

using namespace std;

void getLastDigit(int number) {
	switch (number) {
	case 1:
		cout << "one";
		break;
	case 2:
		cout << "two";
		break;
	case 3:
		cout << "three";
		break;
	case 4:
		cout << "four";
		break;
	case 5:
		cout << "five";
		break;
	case 6:
		cout << "six";
		break;
	case 7:
		cout << "seven";
		break;
	case 8:
		cout << "eight";
		break;
	case 9:
		cout << "nine";
		break;
	case 10:
		cout << "ten";
		break;
	}
}

void getTeens(int number) {
	if (number < 11) {
		getLastDigit(number);
	}
	else if (number < 20) {
		switch (number) {
		case 11:
			cout << "eleven";
			break;
		case 12:
			cout << "twelve";
			break;
		case 13:
			cout << "thirteen";
			break;
		case 14:
			cout << "fourteen";
			break;
		case 15:
			cout << "fifteen";
			break;
		case 16:
			cout << "sixteen";
			break;
		case 17:
			cout << "seventeen";
			break;
		case 18:
			cout << "eighteen";
			break;
		case 19:
			cout << "nineteen";
			break;
		}
	}
}

void getTens(int number) {
	if (number < 20) {
		getTeens(number);
	}
	else if (number < 100) {
		switch (number) {
		case 20:
			cout << "twenty";
			break;
		case 30:
			cout << "thirty";
			break;
		case 40:
			cout << "forty";
			break;
		case 50:
			cout << "fifty";
			break;
		case 60:
			cout << "sixty";
			break;
		case 70:
			cout << "seventy";
			break;
		case 80:
			cout << "eighty";
			break;
		case 90:
			cout << "ninety";
			break;
		default:
			int tens = number - (number % 10);
			getTens(tens);
			cout << ' ';
			getLastDigit(number % 10);
			break;
		}
	}
}

void getHundreds(int number) {
	if (number >= 100 && number < 1000) {
		int hundred = number / 100;
		getLastDigit(hundred);
		if (number == 100 || number == 200 || number == 300 || number == 400 || number == 500 || number == 600 || number == 700 || number == 800 || number == 900) {
			cout << " hundred";
		}
		else {
			cout << " hundred ";
		}
		int tens = (number % 100);
		getTens(tens);

	}
	else {
		getTens(number);
	}
}

void getThousands(int number) {
	if (number > 999 && number < 10000) {
		int thousand = number / 1000;
		getLastDigit(thousand);
		if (number == 1000 || number == 2000 || number == 3000 || number == 4000 || number == 5000 || number == 6000 || number == 7000 || number == 8000 || number == 9000) {
			cout << " thousand";
		}
		else {
			cout << " thousand ";
		}
		int hundreds = number % 1000;
		getHundreds(hundreds);

	}
	else {
		getHundreds(number);
	}
}

int main() {

	int number;
	cin >> number;

	if (number == 0) {
		cout << "zero";
	}
	else {
		getThousands(number);
	}
}