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I changed my C++ base class to be protected inheritance and my dynamic_cast (s) stopped working. Why should changing the inheritance to protected change the behavior of dynamic_cast ? struct Base { static Base *lookupDerived(); // Actually returns a Derived * object. }; struct Derived : protected /* Switch this to public to get it working */ Base { static void test() { Base *base = lookupDerived(); if (dynamic_cast<Derived *>(base)) { std::cout << "It worked (we must be using public inheritance)." << std::endl; } else { std::cout << "It failed (we must be using protected inheritance)." << std:

How do I set a public variable. Is this correct?: class Testclass { public $testvar = "default value"; function dosomething() { echo $this->testvar; } } $Testclass = new Testclass(); $Testclass->testvar = "another value"; $Testclass->dosomething(); marvin this is the way, but i would suggest to write a getter and setter for that variable. class Testclass { private $testvar = "default value"; public function setTestvar($testvar) { $this->testvar = $testvar; } public function getTestvar() { return $this->testvar; } function dosomething() { echo $this->getTestvar(); } } $Testclass = new Testclass

This question is out of curiosity. Is there a difference between: public abstract class MyClass { public MyClass() { } } and public abstract class MyClass { protected MyClass() { } } Thanks. They are the same for all practical purposes. But since you asked for differences, one difference I can think of is if you are searching for the class's constructor using reflection, then the BindingFlags that match will be different. BindingFlags flags = BindingFlags.Public | BindingFlags.Instance; var constructor = typeof(MyClass).GetConstructor(flags, null, new Type[0], null); This will find the

I have been reading a lot of tutorials on C++ class but they miss something that other tutorials include. Can someone please show me how to write and use a very simple C++ class that uses visibility, methods and a simple constructor and destructor? TStamper Well documented example taken and explained better from Constructors and Destructors in C++ : #include <iostream> // for cout and cin class Cat // begin declaration of the class { public: // begin public section Cat(int initialAge); // constructor Cat(const Cat& copy_from); //copy constructor Cat& operator=(const Cat& copy_from); //copy

Given this base class: class Employee { char* name; int age; public: Employee(char* name); void print(); }; With regards to the "public", what's the difference between this: class Manager : public Employee { EmployeeList employees; public: Manager(char* name, Employee* people); void print(); }; and this: class Manager : Employee { EmployeeList employees; public: Manager(char* name, Employee* people); void print(); }; The default is private inheritance. take this example: class B { }; class D: B { }; uses private inheritance as its the default. This means that D gets all the protected and

I'm trying to push a file to a git repo of a friend but errors on public key. git push origin testbranch Permission denied (publickey). fatal: Could not read from remote repository. Where and how do we define public / private keys? git remote -v returns: origin git@github.com:Sesamzaad/NET.git (fetch) origin git@github.com:Sesamzaad/NET.git (push) Any help is appreciated. user3445140 I was facing same problem, here is what I did that worked for me. Use ssh instead of http. Remove origin if its http. git remote rm origin Add ssh url git remote add origin git@github.com:<username>/<repo>.git