ID Number: Q41159
5.00 5.10 6.00 6.00a 6.00ax 7.00 | 5.10 6.00 6.00a
MS-DOS | OS/2
Summary:
To clear the keyboard buffer in Microsoft C versions 5.0, 5.1, 6.0,
6.0a, 6.0ax, and C/C++ version 7.0, use the function rewind() with the
stream STDIN, which is associated with the keyboard by default. The
function fflush() clears the buffers that C programs use for stream
level I/O. It does not clear the device buffer.
More Information:
The following is an example that shows what happens when the
keyboard buffer is not cleared, and then how to clear it:
Sample Code
-----------
/* Compile options needed: none
*/
#include <stdio.h>
void main( )
{
int ch ;
puts( "Input two or more chars. One is read now." );
ch = getchar();
putchar( ch );
putchar( '\n' );
puts( "The next char is taken from stdin." );
ch = getchar( );
putchar( ch );
putchar( '\n' );
rewind( stdin );
puts( "Input two or more chars. One is read now." );
ch = getchar();
putchar( ch );
putchar( '\n' );
rewind( stdin );
puts( "You must enter another char because of the rewind(stdin)" );
ch = getchar( );
putchar( ch );
putchar( '\n' );
}
Additional reference words: 5.00 5.10 6.00 6.00a 6.00ax 7.00