OK – this is working for me on Windows & is portable – notice the #ifdef SIGBREAK – this isn’t a standard signal.
#include <csignal>
#include <iostream>
#include <ostream>
#include <string>
using namespace std;
namespace
{
volatile sig_atomic_t quit;
void signal_handler(int sig)
{
signal(sig, signal_handler);
quit = 1;
}
}
int main()
{
signal(SIGINT, signal_handler);
signal(SIGTERM, signal_handler);
#ifdef SIGBREAK
signal(SIGBREAK, signal_handler);
#endif
/* etc */
while (!quit)
{
string s;
cin >> s;
cout << s << endl;
}
cout << "quit = " << quit << endl;
}