From: shiffy jose [mailto:[EMAIL PROTECTED]
>Hi,
> I am a new member of this group ,can anyone clear the
>following doubts
I note your compiler doesn't have easily accessable help files where
such answers may be easily found. Could I suggest you locate a compiler
that does, or maybe use Google next time?
>1)what is the difference b/w malloc & calloc.
calloc() effectively performs malloc() then sets the memory return to
all-bits-zero. Note that this does not mean that the resultant block of
memory is 'value-zero' for all data types, for example, null pointers
need not be represented by all-bits-zero.
>2)what is the difference b/w strdup & strcpy
strcpy() is a Standard function. strdup() isn't.
strcpy() must be passed a (large enough) buffer into which the string is
placed.
strdup() returns a new buffer (using malloc()) into which the string is
placed - the caller must call free() on this buffer when the string is
finished with.
>3)what is static identifier?
Depends on where it's used.
At file scope it means the variable/function can only be accessed from
within that source file. (internal linkage)
At class scope it is:
a function that doesn't take a 'this' pointer as a hidden
parameter, but still has access to all private members. It can therefore
be called without an instance of the class.
a variable that is shared between all instances of that class.
At function scope it means that the variable retains its value from
one call to the next.
--
PJH
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