The Open Group Base Specifications Issue 6
IEEE Std 1003.1, 2004 Edition
Copyright © 2001-2004 The IEEE and The Open Group, All Rights reserved.

#### NAME

> puts - put a string on standard output

#### SYNOPSIS

> ``#include <stdio.h>
> int puts(const char *`s`);
> ``

#### DESCRIPTION

> [CX] The functionality described on this reference page is aligned with the ISO C standard. Any conflict between the requirements described here and the ISO C standard is unintentional. This volume of IEEE Std 1003.1-2001 defers to the ISO C standard.

> The puts() function shall write the string pointed to by s, followed by a <newline>, to the standard output stream stdout. The terminating null byte shall not be written.

> [CX] The st_ctime and st_mtime fields of the file shall be marked for update between the successful execution of puts() and the next successful completion of a call to fflush() or fclose() on the same stream or a call to exit() or abort().

#### RETURN VALUE

> Upon successful completion, puts() shall return a non-negative number. Otherwise, it shall return EOF, shall set an error indicator for the stream, [CX] and errno shall be set to indicate the error.

#### ERRORS

> Refer to fputc().

The following sections are informative.

#### EXAMPLES

> ##### Printing to Standard Output

> The following example gets the current time, converts it to a string using localtime() and asctime(), and prints it to standard output using puts(). It then prints the number of minutes to an event for which it is waiting.

>     #include <time.h>
>     #include <stdio.h>
>     ...
>     time_t now;
>     int minutes_to_event;
>     ...
>     time(&now);
>     printf("The time is ");
>     puts(asctime(localtime(&now)));
>     printf("There are %d minutes to the event.\n",
>         minutes_to_event);
>     ...

#### APPLICATION USAGE

> The puts() function appends a <newline>, while fputs() does not.

#### RATIONALE

> None.

#### FUTURE DIRECTIONS

> None.

#### SEE ALSO

> fopen(), fputs(), putc(), the Base Definitions volume of IEEE Std 1003.1-2001, <stdio.h>

#### CHANGE HISTORY

> First released in Issue 1. Derived from Issue 1 of the SVID.

#### Issue 6

> Extensions beyond the ISO C standard are marked.

End of informative text.

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