Determining User's OS

[BrainFRZ]

Hey, all. I'm trying to find a way of making a platform independent way of pausing the program pending a key-press, without requiring a carriage return. I found numerous posts and topics regarding this subject, but this one in particular worried me: http://cplusplus.com/forum/beginner/1574/#msg5512.

Since the problem is apparently platform dependent, is there a way of determining the user's operating system? I am guessing there is a macro somewhere that would work, but I haven't been able to find it. Here's my idea:

void pressKeyToExit()
{
    std::cout << "Press any key to exit." << std::endl;

// What is the correct macro?
#ifndef __WIN_32
#include <termios.h>
    termios oldSettings = NULL;
    tcgetattr(fileno(stdin), &oldSettings);

    termios newSettings = oldSettings;
    newSettings.c_lflag &= (~ICANON & ~ECHO);
    tcsetattr(fileno(stdin), TCSANOW, &newSettings);

    getc(stdin);
    tcsetattr(fileno(stdin), TCSANOW, &oldSettings);
#else
#include <conio.h>
    _getch();
    // Remove character from output
    std::cout << static_cast<char>(8);
#endif
}

Also, this is a blatantly hackish workaround, and looks like it. Is there any way of making it more graceful?

[helios]

You can't detect the user's OS. Well, not at run time, anyway. You can use compiler-defined macros to compile different code based on the compiler's target platform. Pretty much what you're doing up there.
http://predef.sourceforge.net/preos.html

As for your real question, provided that you consistently used nothing but std::getline() to get user input from the console, a simple

std::string s;
std::getline(std::cin,s);

will work everywhere.