what's the different

[QQ]

When I include a header file
what's the difference between "" and <>

for example
include <a.h>
and

include "a.h"

No difference?

Thanks a lot!

 

[David Resnick]

When I include a header file
what's the difference between "" and <>

for example
include <a.h>
and

include "a.h"

No difference?

Thanks a lot!

http://www.eskimo.com/~scs/C-faq/q10.8.html

-David

 

[Sarath]

There is a difference !

When u include a file like <> it means that the file is present in the
default loction of C- library files . But when u include a file with "
" then the file is assumed to be present in the current directory from
where the program is compiled and run. If that file is not in the
current directory then u have to write the path to that file in within
the inclue statement itself.

i.e., like

# include "c:/mylib/a.h"

I hope ur doubt is resolved.

Sarath.B

 

[Walter Roberson]

There is a difference !

When u include a file like <> it means that the file is present in the
default loction of C- library files . But when u include a file with "
" then the file is assumed to be present in the current directory from
where the program is compiled and run.

That is not correct, Sarath. When you use "" then the system
directories are still examined, but the current directory is
examined first.

 

[Barry Schwarz]

When I include a header file
what's the difference between "" and <>

for example
include <a.h>
and

include "a.h"

On those systems where the header files are actually files, the <>
notation indicates that the file should be found in the **standard**
location while the "" notation indicates the file should be found in a
"user specified" location.


<<Remove the del for email>>

 

[Lawrence Kirby]

That is not correct, Sarath. When you use "" then the system
directories are still examined, but the current directory is
examined first.

The standard doesn't say "current directory" specifically. The "" form
searches an "implementation-defined manner" and if that fails it then
searches as if the <> form was used. It is certainly true that the
"implementation-defined manner" typically involves a current directory.

In practical terms this means that you should use the <> form for system
headers or library headers that aren't part of your application code, and
the "" form for headers that are part of your code.

Lawrence