fork download

copy

#include <iostream>
 
using namespace std;
 
class Integers
{
public:
	Integers(int* values) { _values = values; }
	~Integers() { delete[] _values; };
 
	const int& operator[](size_t index) const
	{
		return _values[index];
	}
 
	operator const int*() const
	{
		return _values;
	}
 
private:
	int& operator[](size_t index)
	{
		return _values[index];
	}
 
	operator int*() const
	{
		return _values;
	}
 
	int* _values;
};
 
int main()
{
	int* values = new int[5] { 0, 1, 2, 3, 4 };
	Integers ints(values);
	const int& i = ints[2];
	printf("int: %d", i);
	return 0;
}

prog.cpp: In function ‘int main()’:
prog.cpp:39:23: error: ‘int& Integers::operator[](size_t)’ is private within this context
  const int& i = ints[2];
                       ^
prog.cpp:22:7: note: declared private here
  int& operator[](size_t index)
       ^~~~~~~~

Standard output is empty