Here is a function that implement in c,you can use it if you need a function that takes a character from user without enter

readingCharFromKeyboardWithoutEntering.c

#include <termios.h>
#include <unistd.h>

char mygetch(void);

int main()
{

/*
DRIVER SOURCE CODES HERE
I LEAVE IT AS SPACE
YOU CAN WRITE WHAT YOU WANT,YOU SHOULD TRY FIRST...
*/

return 0;
}

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

awesome