fputs

From cppreference.com
< clrm; | io
File input/output
Functions
File access
Direct input/output
Unformatted input/output
fputs
(until C11)(since C11)
(C95)(C95)
(C95)
(C95)(C95)
(C95)
(C95)
Formatted input
Formatted output
File positioning
Error handling
Operations on files
Defined in header <stdio.h>
int fputs( const char *str, FILE *stream );
(until C99)
int fputs( const char *restrict str, FILE *restrict stream );
(since C99)

Writes every character from the null-terminated string str to the output stream stream, as if by repeatedly executing fputc.

The terminating null character from str is not written.

Parameters

str - null-terminated character string to be written
stream - output stream

Return value

On success, returns a non-negative value

On failure, returns EOF and sets the error indicator (see ferror()) on stream.

Notes

The related function puts appends a newline character to the output, while fputs writes the string unmodified.

Different implementations return different non-negative numbers: some return the last character written, some return the number of characters written (or INT_MAX if the string was longer than that), some simply return a non-negative constant such as zero.

Example

#include <stdio.h>

int main(void)
{
    int rc = fputs("Hello World", stdout);

    if (rc == EOF)
       perror("fputs()"); // POSIX requires that errno is set
}

Output:

Hello World

References

  • C11 standard (ISO/IEC 9899:2011):
  • 7.21.7.4 The fputs function (p: 331-332)
  • C99 standard (ISO/IEC 9899:1999):
  • 7.19.7.4 The fputs function (p: 297)
  • C89/C90 standard (ISO/IEC 9899:1990):
  • 4.9.7.4 The fputs function

See also

prints formatted output to stdout, a file stream or a buffer
(function)
writes a character string to stdout
(function)
gets a character string from a file stream
(function)