fputs, fputws

Writes a string to a stream.

Syntax

int fputs(
   const char *str,
   FILE *stream
);
int fputws(
   const wchar_t *str,
   FILE *stream
);

Parameters

str
Output string.

stream
Pointer to FILE structure.

Return value

Each of these functions returns a nonnegative value if it's successful. On an error, fputs and fputws return EOF. If str or stream is a null pointer, these functions invoke the invalid parameter handler, as described in Parameter validation. If execution is allowed to continue, these functions set errno to EINVAL and then return EOF.

For more information on error codes, see errno, _doserrno, _sys_errlist, and _sys_nerr.

Remarks

Each of these functions copies str to the output stream at the current position. fputws copies the wide-character argument str to stream as a multibyte-character string or a wide-character string when stream is opened in text mode or binary mode, respectively. Neither function copies the terminating null character.

The two functions behave identically if the stream is opened in ANSI mode. fputs doesn't currently support output into a UNICODE stream.

By default, this function's global state is scoped to the application. To change it, see Global state in the CRT.

Generic-text routine mappings

TCHAR.H routine	_UNICODE and _MBCS not defined	_MBCS defined	_UNICODE defined
_fputts	fputs	fputs	fputws

Requirements

Function	Required header
fputs	<stdio.h>
fputws	<stdio.h> or <wchar.h>

The console isn't supported in Universal Windows Platform (UWP) apps. The standard stream handles that are associated with the console—stdin, stdout, and stderr—must be redirected before C runtime functions can use them in UWP apps. For more compatibility information, see Compatibility.

Example

// crt_fputs.c
// This program uses fputs to write
// a single line to the stdout stream.

#include <stdio.h>

int main( void )
{
   fputs( "Hello world from fputs.\n", stdout );
}

Hello world from fputs.

See also

Stream I/O
fgets, fgetws
gets, _getws
puts, _putws