.ccls-cache
main
main.c
Makefile
Config files
.replit
replit.nix
/**
* Description: Suppose that there will never be more than one character
* for pushback. Modify getch and ungetch accordingly.
*
**/
#include <stdio.h>
char buf = 0;
/* getch: get a (possibly) pushed back character */
int getch(void)
{
int c;
if(buf != 0)
c = buf;
else
c = getchar();
buf = 0;
return c;
}
/* ungetch: push a character back into input */
void ungetch(int c)
{
if(buf != 0)
printf("ungetch: too many characters\n");
else
buf = c;
}
int main(void)
{
int c;
c = '*';
ungetch(c);
while((c=getch()) != EOF)
putchar(c);
return 0;
}