Press a certain key to stop a loop using a thread in C++

#include <iostream>
#include <thread>
#include <conio.h>
using namespace std;

/*declaring a global boolean variable to be used inside and outside main*/
bool working=true;

/*creating a function to be performed by a thread*/
void _function()
{
    while(working)
    {
        cout<<"Hello\n";
        this_thread::sleep_for(1s);
    }
}

int main()
{
    char _input;

    /*creating a thread to work indepentently to main*/
    thread performer(_function);
    /*a loop to stop the thread when user input a certain character*/
    while(true)
    {

        /*one character input*/
        _input=getch();

        if(_input=='q')
        {
            working=false;
            break;
        }
    }
    performer.join();
    getch();
}