aboutsummaryrefslogblamecommitdiff
path: root/7.2/getch.c
blob: a473190cde976386d36704f77c34af9e14b038a8 (plain) (tree) 
f481f43























1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23























                                                      
#include <stdio.h>
#include <stdlib.h>
#include <error.h>
#include <errno.h>
#include "getch.h"

#define MAXBUFF 100

int gtop;
char buff[MAXBUFF];

char getch(void)
{
	return (gtop > 0) ? buff[--gtop] : getchar();
}

void ungetch(char c)
{
	if (gtop < MAXBUFF)
		buff[gtop++] = c;
	else
	 	error(EXIT_FAILURE, ENOBUFS, "getch");
}