hi all
take a look at this codes
Code:/*source.c*/ #include<stdio.h> #include "file.h" main() { char *name="strom man\n"; sy_hay(name); }Code:/*file.c*/ #include "file.h" void say_hay(char *string) { printf("Hy %s",string); }i get thisCode:/*file.h*/ void say_hay(char *string);
? i don't get it ? why is that?Code:Circular ss <- ss.o dependency dropped.
Why are you including file.h in file.c ?
Teacher: "You connect with Internet Explorer, but what is your browser? You know, Yahoo, Webcrawler...?" It's great to see the educational system moving in the right direction
It gives me a linker error
but hen what is ss and ss.o ?Code:/*source.c*/ #include<stdio.h> #include "file.h" main() { char *name="strom man\n"; sy_hay(name); // shouldn't it be say_hay(name); }
BTW including file.h in file.c is ok but not necessary in this case.
Kurt
file.h has already been included by "source.c", but it's been included again by "file.c"
You need some 'inclusion guards'
ie in file.h
Code:#ifndef INCLUDED_FILE_H #define INCLUDED_FILE_H extern void say_hay(char * string); #endif /* INCLUDED_FILE_H */
They are always a good idea but not "needed" in this case.Originally Posted by zacs7
We have two compilation units in this case. each includes file.h only once -> no problem.
'inclusion guards' protect against multiple inclusions in the same compilation unit only.
Kurt
Sorry, it's become a habit for me to use them everywhere
Just incase it is included more than once
Willie Mays won't like it unless "say_hay" is spelled the same in all three files.
Edit:
I was suggesting that the spelling might be the cause of errors in your program, of course.
Last edited by Adak; 05-10-2007 at 06:10 AM.
sorry about the spelling
and thanks for the advices
i will be back
