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Default value of a function pointer in VC

Royce Roy286212-Feb-2013

Hi!

What is the default value of a function pointer in VC++? (Apparently it can't be NULL, so what is it?)

How is this program supposed to behave and why?

struct S { void (*f)(); };

int Main()
{
S s = S();
s.f(); // What is the value of s.f?
}

Please Help me ASAP!

Thanks in advance

Updated on 13-Feb-2013

Can you answer this question?

Answer

13-Feb-2013

Hi Royce!

According your line of code, object s is zero-initialized which means the function pointer is NULL.

struct S { void (*f)(); };

int Main() { S s = S();

if ( s.f == NULL) std::cout << "s.f is NULL" << std::endl; }

Output: s.f is NULL