Hi,
I have this code:
I know this isn't right, so how do you make it right without having to change much of the concept? I simplified it from a more tedious code. Thanks in advance.Code:int main() { int a = 1; test(); return a; } void test() { int b; int c = 4; b = c + a; }
Code:int main() { int a = 1; test(a); return a; } void test() /* can you figure out yourself how to access the 'a' passed from main? */ { int b; int c = 4; b = c + a; }
hey, thanks for the quick reply...
I understand that you can pass a variable from main... is there any other way besides that?
A global variable?
That sounded to me as if you cried out loud saying:Originally Posted by zacs7
ESBO ! ! ! !
PS: Fond memories of him
Another way if you knew what was going on would be inline assembly
Neither is a good idea in this case.
me-eating-rice, are you from India?
Is your rice-eating over?
me-not-eating-rice
orCode:#include <stdio.h> int a = 1; int test() { return (4 + a); } int main(void) { printf("%d\n", test()); return test(); }
Code:#include <stdio.h> #define a 1 int test() { return (4 + a); } int main(void) { printf("%d\n", test()); return test(); }
I think a define is more preferable here. Or const int (though that would be more appropriate for C++).
You do know that main returning nonzero means that the program exited under faulty or erroneous conditions?
And I don't see a problem with usig a function parameter at all.
There is no law for returned values. 1 can mean success and 0 can mean failure. It's up to the developer to decide...
I won't be taking any sides on what's best, though.
It is however a good idea to try to keep it the same throughout the system, and not "mix and match", because sooner or later you will find yourself having to look up what the actual result should be.
Many systems use "negative for fail", zero or greater is OK. This of course falls down if you return unsigned integers (or pointers)...
--
Mats
Compilers can produce warnings - make the compiler programmers happy: Use them!
Please don't PM me for help - and no, I don't do help over instant messengers.
Yes, the best way would actually be to creates defines in some header file and use through your project.
Returning 1 for failure in one and 0 for failure in one is not what I'd recommend, as you say mats.
