Memory allocation in C++

Question

I am confused about the memory allocation in C++ in terms of the memory areas such as Const data area, Stack, Heap, Freestore, Heap and Global/Static area. I would like to u

Answer 1

I've updated your annotations with what I believe is more correct. Note that Tomalak is correct that 'stack' and 'heap' are not specified by the standard, and mechanisms other than a stack might be used to pass parameters to store automatic variables.

However, I still use those terms because they are actually used quite often in compiler implementations, the terms are more or less well-understood (or easy to understand), and I think they still pragmatically illustrate what you're interested in knowing.

class Foobar
{
      int n; //Stored wherever the current object is stored
             //  (might be static memory, stack or heap depending 
             //  on how the object is allocated)

      public:

          int pubVar; //Stored wherever the current object is stored 
                      //  (might be static memory, stack or heap depending 
                      //  on how the object is allocated)

          void foo(int param)  //param stored in stack or register
          {
                int *pp = new int; //int is allocated on heap.
                n = param;
                static int nStat;  //Stored in static area of memory
                int nLoc;          //stored in stack or register
                string str = "mystring"; // `str` is stored in stack, however 
                                         //    the string object may also use heap 
                                         //    to manage its data
                ..
                if(CONDITION)
                {
                    static int nSIf; //stored in static area of memory
                    int loopvar;     //stored in stack or register
                    ..
                }
          }
}

int main(int)
{
     Foobar bar;    //bar stored in stack

     Foobar *pBar;  //pBar is stored in stack

     pBar = new Foobar();  //the object is created in heap.  
                           //   The non-static data members are stored in that
                           //   memory block.

}