Konwersja_szesnastkowy

#include <iostream>
#include <string>
#include <sstream>
using namespace std;

string str;
bool dzielenie = true;
int i;
int l;

main()
{
    cout << "podaj liczbe dziesietna: ";
    cin >> l;

    while(dzielenie)
    {
        if(l < 16)
        {
            dzielenie = false;
        }

        //cout << l%2;
        //stringstream ss;
        //ss << l%2;
        //string str = ss.str();
        //str = to_string(l%2) + str;
        switch(l%16)
        {
            case 0:
            str = "0" + str; break;
            case 1:
            str = "1" + str; break;
            case 2:
            str = "2" + str; break;
            case 3:
            str = "3" + str; break;
            case 4:
            str = "4" + str; break;
            case 5:
            str = "5" + str; break;
            case 6:
            str = "6" + str; break;
            case 7:
            str = "7" + str; break;
            case 8:
            str = "8" + str; break;
            case 9:
            str = "9" + str; break;
            case 10:
            str = "A" + str; break;
            case 11:
            str = "B" + str; break;
            case 12:
            str = "C" + str; break;
            case 13:
            str = "D" + str; break;
            case 14:
            str = "E" + str; break;
            case 15:
            str = "F" + str; break;
        }
        l = l/16;
    }

    cout << str;

}