putc()
QNX SDP8.0C Library ReferenceAPIDeveloper
Write a character to a stream
Synopsis:
#include <stdio.h>
int putc( int c,
FILE* fp );
Arguments:
- c
- The character that you want to write.
- fp
- The stream you want to write the character on.
Library:
libc
Use the -l c option to qcc to link against this library. This library is usually included automatically.
Description:
The putc() macro writes the character c,
cast as (int)(unsigned char)
, to the
output stream designated by fp.
Returns:
The character written, cast as (int)(unsigned char)
,
or EOF if an error occurs
(errno is set).
Examples:
#include <stdio.h>
#include <stdlib.h>
int main( void )
{
FILE* fp;
int c;
fp = fopen( "file", "r" );
if( fp != NULL ) {
while( (c = fgetc( fp )) != EOF ) {
putc( c, stdout );
}
fclose( fp );
}
return EXIT_SUCCESS;
}
Classification:
Safety: | |
---|---|
Cancellation point | Yes |
Signal handler | No |
Thread | Yes |
Caveats:
putc() is a macro.
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