jdm5548@diamond.tamu.edu (James Darrell McCauley) (07/19/90)
What generally causes instructions to be executed out of order?
This occurred once while over stepping the bounds of an array
(and I assume writing in memory locations where instructions are
stored), but I don't believe that is the case for my current
problem. Specifically, what would cause the following?
/* instructions */ /* script of execution */
main() % gcc main.c
{ % a.out
... *Christ
fgetc(stdin); *comes
printf("*Christ\n"); ^M^M
... *first
printf("*comes\n"); %
fgetc(stdin); % <bang head against console>
printf("*first\n");
}
I get the same results with getchar().
This may be a FAQ and/or reflect my own ignorance, so in an effort to
avoid negative comments, please E-mail any suggestions. Thanks.
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James Darrell McCauley jdm5548@diamond.tamu.edu
Dept of Ag. Engineering (409) 845-6484
Texas A&M University, College Station, Texas 77843-2117, USA
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -jdm5548@diamond.tamu.edu (James Darrell McCauley) (07/21/90)
I'm an reposting this question because, as 1 of the 2 responses
mentioned, I may have not made myself quite clear.
Here's the code fragment:
main()
{
...
getchar(); /* stdin, as well as stdout, are console */
printf("first line\n");
... /* calculations - no I/O */
printf("second line\n");
getchar();
printf("third line\n");
}
and script of execution:
% a.out
first line
second line
<hit return>
<hit return again>
third line
%
I should have to press return before the first line is printed! Why does it do
this? Do I have to clear the input buffer somehow?
I am running SunOS 4.0.3 and I am not redirecting stdin or stdout.
I have experienced the same thing using DOS. This is just a general question
(not something I couldn't work around) that I don't think should be machine
specific.
Thanks.
Darrell McCauley, jdm5548@diamond.tamu.edu (128.194.14.1)
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James Darrell McCauley jdm5548@diamond.tamu.edu
Dept of Ag. Engineering (409) 845-6484
Texas A&M University, College Station, Texas 77843-2117, USA
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -cpcahil@virtech.uucp (Conor P. Cahill) (07/21/90)
In article <6732@helios.TAMU.EDU> jdm5548@diamond.tamu.edu (James Darrell McCauley) writes: >I'm an reposting this question because, as 1 of the 2 responses >mentioned, I may have not made myself quite clear. >Here's the code fragment: When you post a message with a code fragment, post the entire fragment that exhibits the indicated behavior. I ran you fragment (deleting the elipsisi) and it acted as on would expect. I don't know what the missing code is, but it probably has something to do with the problem. > main() > { > ... > getchar(); /* stdin, as well as stdout, are console */ > printf("first line\n"); > ... /* calculations - no I/O */ > printf("second line\n"); > getchar(); > printf("third line\n"); > } So show us the missing code or post an exact copy of the code that presents the problem. -- Conor P. Cahill (703)430-9247 Virtual Technologies, Inc., uunet!virtech!cpcahil 46030 Manekin Plaza, Suite 160 Sterling, VA 22170