03-09-2002
disturbing problem with PRINTF() !!
hello everybody,
here is my problem:
________________________________________
#include <stdio.h>
int main()
{
int i=10;
printf("value is %i",i);
return 0;
}
_________________________________________
when i compile and execute, nothing appears on screen!!
but if i replace the printf line with this one:
printf("value is %i\n",i); // i just added a \n
then i can see the line displayed on my screen.
ok, that's allright, but what if i want to display something _without_ the \n ?
someone told me it was a classic buffer problem and adviced me to use fflush()
but when i write:
printf("value is %i",i); fflush(stdout);
nothing happens. i also tried to put fflush(stdout) before the printf, because i don't know how to use this function correcly, but nothing happened.
can someone explain me what's the matter?!!
im using Linux Mandrake 8.0
thanks
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LEARN ABOUT OPENSOLARIS
fputs
puts(3C) Standard C Library Functions puts(3C)
NAME
puts, fputs - put a string on a stream
SYNOPSIS
#include <stdio.h>
int puts(const char *s);
int fputs(const char *s, FILE *stream);
DESCRIPTION
The puts() function writes the string pointed to by s, followed by a NEWLINE character, to the standard output stream stdout (see
Intro(3)). The terminating null byte is not written.
The fputs() function writes the null-terminated string pointed to by s to the named output stream. The terminating null byte is not writ-
ten.
The st_ctime and st_mtime fields of the file will be marked for update between the successful execution of fputs() and the next successful
completion of a call to fflush(3C) or fclose(3C) on the same stream or a call to exit(2) or abort(3C).
RETURN VALUES
On successful completion, both functions return the number of bytes written; otherwise they return EOF and set errno to indicate the error.
ERRORS
Refer to fputc(3C).
USAGE
Unlike puts(), the fputs() function does not write a NEWLINE character at the end of the string.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Interface Stability |Standard |
+-----------------------------+-----------------------------+
|MT-Level |MT-Safe |
+-----------------------------+-----------------------------+
SEE ALSO
exit(2), write(2), Intro(3), abort(3C), fclose(3C), ferror(3C), fflush(3C), fopen(3C), fputc(3C), printf(3C), stdio(3C), attributes(5),
standards(5)
SunOS 5.11 18 Jun 2003 puts(3C)