ISO c++ forbids initialization of member

[AndroidZ]

#include <stdlib.h>
class IntStack
{
    int INITIAL_SIZE = 100;
    int i;
    int* st_arr = new int[INITIAL_SIZE];
public:
    void reset();
    void push(int n);
    void push(int a[], size_t array_size);
    int pop();
    void pop(int a[], size_t n);
    int top();
    int size();
    bool is_full();
    bool is_empty();
    friend IntStack print_stack(IntStack* pstack);
};

Is there any way to initialize INITIAL_SIZE in this class without using a different source file?

[codekiddy]

ISO c++ forbids initialization of member
it fobids because your compiler does not support C++0x future for initializing class members.

use constructors:

#include <stdlib.h>
class IntStack
{
    int INITIAL_SIZE;
    int i;
    int* st_arr;
public:




	//DEFAULT CONSTRUCTOR
	IntStack() : INITIAL_SIZE(100), st_arr(new int [INITIAL_SIZE]) {}

	//OVERLOADED CONSTRUCTOR
	explicit IntStack(int num) : INITIAL_SIZE(num), st_arr(new int [INITIAL_SIZE]) {}

	//DESTRUCTOR
	~IntStack() { delete [] st_arr;}

	//COPY CONSTRUCTOR
	IntStack(const IntStack& ref) : INITIAL_SIZE(ref.getInit()), st_arr(new int [INITIAL_SIZE]) {
		for(int i = 0; i < INITIAL_SIZE; ++i)
			st_arr[i] = ref.get_st_array(i);
	}

	//MOVE CONSTRUCTOR
	IntStack(IntStack&& ref) : INITIAL_SIZE(ref.INITIAL_SIZE), st_arr(ref.st_arr) {
		st_arr = nullptr;
		i = 0;
		INITIAL_SIZE = 0;
	}

        //METODS USED BY CONSTRUCTORS
	int get_st_array(int x) const {
                return st_arr[x];
        }
	int getInit() const {
                return INITIAL_SIZE;
        };




    //your code...
    void reset();
    void push(int n);
    void push(int a[], size_t array_size);
    int pop();
    void pop(int a[], size_t n);
    int top();
    int size();
    bool is_full();
    bool is_empty();
    friend IntStack print_stack(IntStack* pstack);
};