Hi,
if i write a program like this
My doubt is about the "j" variable. Does it come under file scope? Does file scope mean it should be visible to all the functions in the file? Should we ever use this kind of definition for "j"?Code:void test(int i); int main(void) { test(3); } int j; void test(int i) { printf("%d",i); }
Thanks and regards,
Satya
Yes, j has file scope. That means it is accessible to all functions in the same source file that are defined AFTER it is declared. In your example, it is therefor accessible by test() but not by main().
There are circumstances where such a definition is useful. However, there are more circumstances where such a definition is bad practice, and alternatives are better.
The "j" variable has file scope but still main cannot access it. Is it not contradictory? So if someone says a variable has file scope, then i should also see where it is declared that is after which function.Originally Posted by grumpy
Thanks and regards,
Satya
Nup. The END of the variable's scope corresponds to the end of the file, hence the name.
There is another rule that says (essentially - I'm oversimplifying) no code statement can access a variable before that variable is seen by the compiler.
Last edited by grumpy; 05-21-2014 at 07:57 AM.
