#include <iostream>
#include <cmath>
using namespace std;

// BINARY - DECI VICE VERSA (di pa tapos)
int dec_bin(int x) // decimal to binary start
{
    int incr, res;
    incr = 1;
	res = 0;

    while(x != 0)
    {
        if (x % 10 == 1){
            res = res + incr;
            x = x-1;
        }
        x = x / 10;
        incr = incr*2;
    }
    cout << res;
}

void bin_dec(int x) // binary to decimal start
{
    if (x / 2 != 0) {
        bin_dec(x / 2);
    }
    cout << x % 2;
}
void

int main()
{
    int order;
    int x;
    cout << "CHOOSE PROCESS\n********************\n1. DECIMAL TO BINARY\n2. BINARY TO DECIMAL\n********************" << endl;
    cout << "= ";
    cin >> order;
    if (order == 1){
    	system("cls");
    	cout << "Converting - DECIMAL TO BINARY" << endl;
        cout << "Enter a number: ";
        cin >> x;
		bin_dec(x);
    }
    else if (order == 2){
        bin_dec(x);
    	system("cls");
    	cout << "Converting - BINARY TO DECIMAL" << endl;
        cout << "Enter a number: ";
        cin >> x;
       dec_bin(x);
    }
    else{
        cout<<"Null - B O B O!";
    }
}