/* Standard C header */
#include <stdio.h>    /* for getchar(), printf() */

/* POSIX headers */
#include <termios.h>  /* for tcxxxattr, ECHO, etc */
#include <unistd.h>   /* for STDIN_FILENO */

int Getch(void);

int main(void)
{
    printf("Press any key to continue...");
    Getch();

    return 0;
}

int Getch (void)
{
    int ch;
    struct termios oldt, newt;
  
    tcgetattr(STDIN_FILENO, &oldt);
    newt = oldt;
    newt.c_lflag &= ~(ECHO|ICANON);
    tcsetattr(STDIN_FILENO, TCSANOW, &newt);
    ch = getchar();
    tcsetattr(STDIN_FILENO, TCSANOW, &oldt);
  
    return ch;
}