Is there a way to detect if a key has been pressed?

Question

I am compiling and executing my programs in cygwin on a windows computer. I am quite inexperienced in C but I would like a way to detect if a key has been pressed without prompt

Answer 1

Most of Dos, Windows 3.x or win32 platform provide the file conio.h, but unix or linux Os is not provide this file normally. If you use unix or linux Os , you must download it on the internet By yourself. i hope my answer is useful for you.

Answer 2

I use the following function for kbhit(). It works fine on g++ compiler in Ubuntu.

#include <termios.h>
#include <unistd.h>
#include <fcntl.h>
int kbhit(void)
{
  struct termios oldt, newt;
  int ch;
  int oldf;

  tcgetattr(STDIN_FILENO, &oldt);
  newt = oldt;
  newt.c_lflag &= ~(ICANON | ECHO);
  tcsetattr(STDIN_FILENO, TCSANOW, &newt);
  oldf = fcntl(STDIN_FILENO, F_GETFL, 0);
  fcntl(STDIN_FILENO, F_SETFL, oldf | O_NONBLOCK);

  ch = getchar();

  tcsetattr(STDIN_FILENO, TCSANOW, &oldt);
  fcntl(STDIN_FILENO, F_SETFL, oldf);

  if(ch != EOF)
  {
    ungetc(ch, stdin);
    return 1;
  }

  return 0;
}