Number Words

#include <iostream>
#include <vector>
#include <algorithm> //http://www.cplusplus.com/articles/NhA0RXSz/

using namespace std;

void writeout(int, int);
void printNumbers();

vector<string> ones {"","one", "two", "three", "four", "five", "six", "seven", "eight", "nine"};
vector<string> teens {"ten", "eleven", "twelve", "thirteen", "fourteen", "fifteen","sixteen", "seventeen", "eighteen", "nineteen"};
vector<string> tens {"", "", "twenty", "thirty", "forty", "fifty", "sixty", "seventy", "eighty", "ninety"};
vector<string> numbers;

//Vectors above


int main() {
    int variable;
    cout << "Enter the num\n>> ";
    cin >> variable;
    writeout(variable, 0);
}

void writeout(int num, int start) {
    for (int x = start ; x <= num ; x++) {
        if (x < 10) {
            // cout << ones[x] << " ";
            numbers.push_back(ones[x]);  //puts it in array to be sorted
        }
        else if (x < 20) {
            // cout << teens[x%10] << " ";
            numbers.push_back(teens[x%10]);
        }
        else if (x < 100) {
            // cout << tens[x/10] << ones[x%10] << " ";
            numbers.push_back(tens[x/10] + ones[x%10]);
        }
        else if (x < 1000) {
            cout << ones[x/100] << "hundred"; writeout(x%100,x%100); //will recall function to complet rest
            numbers.push_back(ones[x/100] + "hundred");
        }
        else if (x < 10000) {
            cout << ones[x/1000] << "thousand"; writeout(x%1000,x%1000);
        }
        else if (x < 100000) {
            cout << teens[x/10000] << "-thousand"; writeout(x%10000,x%10000);
        }
        else if (x < 1000000) {
            cout << ones[x/100000] << "hundred-thousand"; writeout(x%100000,x%100000);
        }
    }
    printNumbers();
}

void printNumbers() {
    sort(numbers.begin(), numbers.end()); //sort will alphabetically sort them
    for (int x = 0 ; x < numbers.size() ; x++) {
        cout << numbers[x];
    }
}