Re: Simple linked list question.
On Nov 11, 11:51 pm, Robby <Ro...@discussions.microsoft.com> wrote:
Is it necessary to return a value for the following function?
student *add_list(student **ps, char *n, int sc)
Since a pointer of type student is passed by reference, why should we nee=
d
to return it? In any case with or without the return statment and removin=
g
the return specifier from the function, the snippet works anyways... like
this:
void add_list(student **ps, char *n, int sc)
// return *ps;
So is it necessary to return something in this case? or if I am missing
something, why is he returning ps?
Although not particularly useful here, in general it's a common
technique to allow method chaining; eg instead of:
struct SomeObj {
void bar() { ...}
void baz() { ... }
};
extern void foo(SomeObj&);
SomeObj a;
foo(a);
a.bar(); // chore
a.baz(); // chore
You can do:
struct SomeObj {
SomeObj& bar() { ...; return *this;}
SomeObj& baz() { ...; return *this;}
};
extern SomeObj& foo(SomeObj&);
SomeObj a;
foo(a).bar().baz(); // all in one !
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