doubt on c

[mallik]

hi,


Recently i was attended one interview, The interviewer has ask me , what is the difference u saw in c under windows and Linux ....

Can any body give me the answer.....

Thanks in Advance

[tech_man]

There is none really except for some function calls to the OS...

[Lakshmipathi]

yes..i think with linux ,one can invoke OS system calls directly ...but in windows too we have init() functions...
other than is ,C is same at linux / windows ...
am i right ....are do we have much more difference??
i hope someone can provide much more detailed info.

[Cabhan]

The C language is identical under both. Both have ANSI C compilers, which is the C standard.

The difference comes when you look at the available libraries. For instance, under Linux, we have glibc. glibc adheres to the POSIX standard, and so implements a number of such functions. glibc also goes past the ANSI standard, and has a great many functions that do all sorts of fun stuff.

Windows uses the Win32 libraries, which have a similar purpose to glibc, but may use different names, may do different things, and does not also include the POSIX standard.

A good comparison might be threads. Under Linux, if you write a threaded application in C, you are using pthreads (POSIX threads). I know nothing about Win32, but it uses its own thread implementation, that works differently.