C++. Error: void is not a pointer-to-object type

Question

I have a C++ program:

struct arguments
{
  int a, b, c;  
  arguments(): a(3), b(6), c(9) {}
};

class test_class{
  public:

    void *member_func(void *arg         


        

Answer 1

The problem above there is that you are trying to deference a void pointer which is not allowed in C or C++.

However, this still works:

#include 
using namespace std;
int main()
{
    int b=10;
    void *a=&b;
    int *ptr=(int*)a;
    cout<<*ptr;;
} 

We can deference int* pointers after casting void pointers to int* pointers.