member of class inaccessible

[cniper]

i am writing a program where i have to print float array. here is my header file:

#ifndef FLOAT ARRAY_H
#define FLOAT ARRAY_H
class floatArray
{
	friend std::istream& operator>>(std::istream& is,floatArray& v);
	friend std::ostream& operator<<(std::ostream& os,const floatArray& v);
public:
	floatArray();
	floatArray(const floatArray& rhs);
private:
	float*mData;
	int mSize;
};
#endif 

the implementation file is:

#include"floatArray.h"
#include<iostream>
using namespace std;
floatArray::floatArray()
{
	*mData=0.0f;
}
floatArray::floatArray(const floatArray& rhs)
{
	int len=rhs.mSize;
	mData=new float[len];
	for(int i=0;i<len;i++)
		rhs.mData[i]=mData[i];
}
std::ostream& operator<<(std::ostream& os,const floatArray& v)
{
	for(int i=0;i<v.mSize;i++)
		cout<<v.mData[i];
	return os;
}
std::istream& operator>>(std::istream& is,floatArray& v)
{
	for(int i=0;i<v.mSize;i++)
	{
		cout<<"["<<i<<"]="<<"\n";
		cin>>v.mData[i];
	}
	return is;
}

problem it is giving error that floatArray::mSize not accessible and
floatArray::mData is not accessible.
any help would be appreciated.

[Volatile Pulse]

Because the iostream operators aren't friends of your class. They don't have rights to access your private members.

[cniper]

could you please elaborate!! i think i have included them as friend

[Volatile Pulse]

_{Sorry, I was wrong on that. Friend's only have access to protected. Private is for the class, and class only, to have access to. Protected is available for friends and derived I believe.}

Edit: I was right originally -.-

[Peter87]

std::istream and std::ostream has not been declared when you mention them on line 5-6 in floatArray.h.

Add the includes in floatArray.h.

#include <istream>
#include <ostream> 

[Peter87]

@Volatile Pulse
Friends can access private members.

[cniper]

that solved my problem. thanks!!

[guestgulkan]

If the code you have posted is truly represntative of your code, then the compiler should have displayed more than floatArray::mSize not accessible and
floatArray::mData is not accessible.

You need to do the following.

#ifndef FLOAT ARRAY_H
#define FLOAT ARRAY_H
#include <iostream> //addd this here 
class floatArray
{

While we have your attention:
In the constructor

floatArray::floatArray()
{
	*mData=0.0f; //Error
}

I'm sure you plan to do this - but as you are allocating/deallocating
memory you will need an appropriate assignment operator= function and an appropriate
destructor.

[cniper]

yes compiler did posted more errors!! but as you and Peter87 said including #include<iostream> solved my problem. thanks guys.