private-members

I am trying to declare an ifstream object in a header file as is shown but I get an error saying that it cannot be accessed. I have tried various things such as making it into a pointer instead, initialising in the .c file etc. but my code can't seem to get part the declaration of it. ReadFile.h: #ifndef READFILE_H #define READFILE_H #include "cv.h" #include "highgui.h" #include <iostream> #include <fstream> class ReadFile{ private: std::ifstream stream; public: std::string read(); ReadFile(); // Default constructor ~ReadFile(); // Destructor }; #endif ReadFile.c: #include "ReadFile.h"

This is based on GCC/G++ and usually on Ubuntu. Here's my sample program I've done: #include <iostream> using namespace std; int main() { std::string c = "Test"; cout << c; return 0; } The above code works fine. But I have two issues that I don't quite get... Writing the string declaration as std:string (with one : ) also works fine. What's the difference? If I use std:string (with one : ) within a class to declare a private variable, I get an error error: ‘std’ does not name a type . Example of this declaration: class KType { private: std:string N; }; Can someone please explain these issues?

I've just been experimenting and found that when I run the rolling code, it does not compile and I can't figure out why. My IDE says 'Cannot make a static reference to the non-static field list', but I don't really understand what or why this is. Also what else does it apply to, i.e.: is it just private variables and or methods too and why?: public class MyList { private List list; public static void main (String[] args) { list = new LinkedList(); list.add("One"); list.add("Two"); System.out.println(list); } } However, when I change it to the following, it DOES work: public class MyList {

I was writing a decorator that needs to access private variables and found this discrepancy. Can anyone explain this? (Python 2.5) Naming mangling works as expected for attributes defined in the class: >>> class Tester(object): ... __foo = "hi" >>> t = Tester() >>> t._Tester__foo 'hi' Instance attributes do not work (and this is the way we are supposed to do it right?) >>> class Tester(object): ... def __init__(self): ... self.__foo = "hi" >>> t = Tester() >>> t._Tester__foo AttributeError: 'Tester' object has no attribute '_Tester__foo' P.S. Is "class attribute" the right word for these? They

I've been using visual studio for some time and it annoys me everytime when I work with Classes. The problem is, when I create an object of a Class I tend to see the private members belongs to that class and I don't want to, because what if I create a class with 10+ private variable, then it will be a nightmare, there must be a way to hide private members, If there is a way could you please share it with me? Thank you :) EDIT: Here is a picture that will help you understand what I'm talking about, for example here I have 2 private variables of LinkedList class (curSize and head) I won't be