====== ungetch ======
<code c>
int ungetch(int ch);
</code>

==== description of ungetch ====
Pushes a character back into the keyboard buffer.\\
\\
return\\
Successful execution ungetch returns the character ch.\\
If an error occurs, the function returns EOF.\\


<code c>
#include <stdio.h>
#include <ctype.h>
#include <conio.h>

int main(void)
{
   int i=0;
   char ch;
   puts("Input an integer followed by a char:");

   while((ch = getche()) != EOF && isdigit(ch))
      i = 10 * i + ch - 48; 

   if (ch != EOF)
      ungetch(ch);
  printf("\n\ni = %d, next char in buffer = %c\n", i, getch());
   return 0;
}
</code>

===== output of ungetch c example =====
   The answer is almost 42
   horizontal cursor position from where this text appears = 1
   
   c:\Borland>ungetch.exe
   Input an integer followed by a char:
   1c
   
   i = 1, next char in buffer = c

{{:c:conio.h:ungetch.png?nolink|}}