dear friends,
i am using ifort compiler in linux.
when i am trying to write something like
write(*,'(1x,'a20',advance='no')"STARTING CALCULATION"
.
!do the calculation.
.
write(*,'a18')"calculation done'

i am expecting the program to write "STARTING CALCULATION" at the
beginning of the calc; do the calc. and write "calculation done' in
the same line when its over.
but its not doing the same thing..rather its waiting to finish the
calc. and writing the whole line in one go...anu idea?

check with this program.....
1 implicit none
2 write(*,'(a20)',advance='no')"checking "
3 call sleep(2)
4 write(*,*) "checked"
5 end

On 2008-05-12 10:22:39 -0300, rudra gmail.com> said:

Unbalance quotes so it is not what you actually did.

When you use the advance="no" it makes sense to think of it as "to be
continued".
Here you just took a long time to continue you thoughts about the output.

Remove the advance="no" if you want to see the output sooner.

rudra gmail.com> writes:

You need to flush the output buffer after the first write. The system
is just trying to be more efficient by buffering its output. It has
no idea in advance how long the computation is going to take.

tholen@antispam.ham wrote:

(snip)

(snip)

The C/unix tradition is that terminal output (either stderr, or
stdout not redirected to a file) is unbuffered. The output will
appear immediately without the need for fflush(). When going
to a file or even a pipe it is buffered and normally doesn't appear
immediately.

glen herrmannsfeldt ugcs.caltech.edu> writes:

glen herrmannsfeldt wrote:
...

...

On 2008-05-12, glen herrmannsfeldt ugcs.caltech.edu> wrote:

From the latest(?) ISO C draft (n1256.pdf), page 267:

"""
At program startup, three text streams are predefined and need not be
opened explicitly - standard input (for reading conventional input),
standard output (for writing conventional output), and standard error
(for writing diagnostic output). As initially opened, the standard
error stream is not fully buffered; the standard input and standard
output streams are fully buffered if and only if the stream can be
determined not to refer to an interactive device.
"""

Janne Blomqvist wrote:

On 2008-05-12, glen herrmannsfeldt ugcs.caltech.edu> wrote: