putchar()
QNX SDP8.0C Library ReferenceAPIDeveloper
Write a character to standard output
Synopsis:
#include <stdio.h>
int putchar( int c );
Arguments:
- c
- The character that you want to write.
Library:
libc
Use the -l c option to qcc to link against this library. This library is usually included automatically.
Description:
The putchar() function writes the character c,
cast as (int)(unsigned char)
, to the
stdout stream.
It's equivalent to:
fputc( c, stdout );
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" );
c = fgetc( fp );
while( c != EOF ) {
putchar( c );
c = fgetc( fp );
}
fclose( fp );
return EXIT_SUCCESS;
}
Classification:
Safety: | |
---|---|
Cancellation point | Yes |
Signal handler | No |
Thread | Yes |
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