doc so

//https://www.facebook.com/pages/C%C3%B9ng-h%E1%BB%8Dc-l%E1%BA%ADp-tr%C3%ACnh/632038696941833?ref=bookmarks
#include <iostream>
using namespace std;

char so[][7] = { " khong", " mot", " hai", " ba", " bon", " nam", " sau", " bay", " tam", " chin" };
char dv[][9] = { " trieu", " nghin", " tram", " muoi", " le"};
void main()
{
	long int n = 0, a;
	int t = 0;
	cout << endl;
	cin >> a;
	while (a > 0)
	{
		n = n * 10 + (a % 10);
		a = a / 10;
		t++;
	}
	while (n > 0)
	{
		if (n % 10 != 0 || t % 3 == 0)
		{
			if (t % 3 == 2 && n % 10 == 1);
			else
				cout << so[n % 10];
		}
		if ((t - 1) / 3.0 == 1) cout << dv[1];
		if ((t - 1) / 3.0 == 2) cout << dv[0];
		if (t % 3 == 0) cout << dv[2];
		if (t % 3 == 2)
		{
			if (n % 10 == 0) cout << dv[4];
			else
				cout << dv[3];
		}
		n = n / 10;
		t--;
	}
	if (t > 3 && t < 6) cout << dv[1];
	if (t > 6) cout << dv[0];
	main();
}