putc()

Write a character to a stream

Synopsis:

#include <stdio.h>

int putc( int c, 
          FILE* fp );

Library:

libc

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:

ANSI

Safety:
Cancellation point	Yes
Interrupt handler	No
Signal handler	No
Thread	Yes

Caveats:

putc() is a macro.