#include "getch.h"
#include <stdio.h>


#define BUFSIZE 100

static char buf[BUFSIZE];
static int bufp = 0;

int getch(void)
{
  return (bufp>0) ? buf[--bufp] : getchar();
}

void ungetch(int c)
{
  if (bufp >= BUFSIZE) {
    printf("ungetch: too many characters\n");
  }else{
    buf[bufp++] = c;
  }/*endif*/
}