getchar
extern int getchar(void);
extern int getchar(void);
int c = getchar();
c = getchar();
# define NEXTBYTE getchar()
# define getch() getchar() /* not correct, but may not be on a console */
weak_alias (getchar, getchar_unlocked)
extern int getchar (void);
getchar();
getchar();
getchar();
getchar();
getchar();
printf("hit enter "); while (getchar() != '\n');