ivan

Hi,
I am making a simple database program in C right now, and I have one problem. I need to know if there is any function that deletes the content of STDIN???
Thanks for help.

InfoGeek

if you mean to flush stdin, then use

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jim mcnamara

rewind(stdin) is not really defined for stdin when it is a terminal or a pipe.- rewind is the same as
which is essentially meaningless for a tty.

The usual approach is a platform-specific hunk of code. Some wierd compilers actually define fflush(stdin) as valid - this is not standard though because the standard says that fflush(stdin) has undefined behavior.

What platform are you on Windows? Linux?

tempest

[php]
#include <stdio.h>

#define clear_stdin() while(getc(stdin) != '\n')

int main(int argc, char* argv)
{
char bleh = getc(stdin);
printf("%c\n", bleh);
clsStdin();
bleh = getc(stdin);
printf("%c\n", bleh);
return 0;
}
[/php]

Output:

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ivan

I have windows xp.

ivan

tempest that's not working.
clsStdin() is an undefined reference.

Otherwise, my compiler is Dev-C++

Benoit

Wouldn't you just use fflush(stdin); ?

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Polyphemus_

i think he made a typo, since he has defined the macro clear_stdin at the top. He meant clear_stdin instead of clsStdin.

tempest

Yea, my bad... i compiled it one way and then changed it for asthetics and forgot to change both parts...

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ivan

Both fflush( stdin ) and rewind( stdin ) are working.
What the difference then and which one should I use?