UNGETCH(DOS) XENIX System V UNGETCH(DOS)
Name
ungetch - Returns a character to the console buffer.
Syntax
#include <conio.h>
int ungetch (c);
int c;
Description
The ungetch function pushes the character c back to the
console, causing c to be the next character read. ungetch
fails if it is called more than once before the next read.
Return Value
ungetch returns the character c if it is successful. A
return value of EOF indicates an error.
See Also
cscanf(DOS), getch(DOS), getche(DOS)
Example
#include <conio.h> #include <ctype.h>
char buffer[100]; int count = 0; int ch;
/* The following code gets a token, delimited by blanks **
newlines, from the keyboard. */
ch = getche ( );
while (isspace (ch)) /* skip preceding white space
*/ ch = getche ( );
while (count < 99) { /* gather token */
if (isspace (ch)) /* end of token */
break;
buffer[count++] = ch; ch = getche ( ); }
ungetch (ch); /* put back delimiter */
buffer[count] = '\0'; /* null terminate the token */
Notes
This call must be compiled with the -dos flag.
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