I’m making a project for my college in which I am implementing factory design but the problem is i cant return the address of object it gives an error conversion "C++ conversion to inaccessible base class is not allowed". #include<iostream> using namespace std; class card { protected: int fee; int limit; public: virtual void setvar() ..
Category : access-modifiers
Why is this not possible? class DBHelper { public: bool open(const char* filepath, const char* query = ""); private: bool open(const char* filepath); } If I want to access the function open(filepath) of my library from another class it won’t compile, eventhough the compiler should take the public function with the default argument. I don’t ..
I’m a newbie and i’m not sure what i’ve done wrong here. the code is pretty self explanatory and basic. Just input and output however i’m getting the error: error: qualified-id in declaration before ‘<<’ token I have seem similar questions online however as they are similar and not the same the solutions don’t seem ..
I searched it up and found out that there’s no such thing as "public class" in C++ but it can be used in Java and C#. A Youtuber used a public class and the video was about some other topic so they didn’t explain it. Here’s the code they typed… public class in C++ I’m ..
I have a template class template<class T> class MyClass { public: MyClass() { privateField = 0; }; T getPrivateField() { return privateField; } private: T privateField; }; and a template function which takes an instance of MyClass as a parameter template<class T> T foo(MyClass<T> mc) { return mc.privateField; } I was confused by the fact ..
In the following code: class Outer { private: void f_private(Outer::Inner in); // Wrong public: class Inner {}; void f_public(Outer::Inner in); // OK }; f_private() cannot use nested class Outer::Inner as parameter type. But it’s ok to do so in f_public(). Can someone explain to me what rule is this based on? And what’s the benefit ..
so the idea is to create a modifier like "long" or "unsigned" or "public" or "private" with user-defined behavior. Not for any real programming reason, just out of interest. Perhaps I want a "beeg" modifier that squares the memory allocated (like a long, but on a different scale). I would then be able to do ..
I have an interface in C++ that looks something like this: // A.h #pragma once class A { public: //Some declarations. private: //Some declarations. protected: //Some declarations. }; The specific form is not important. Since this is an interface, there will be a class B that inherits from A. In the header file for class ..
recently I am doing a project for a school course. I always declare all variables and methods inside every classes public because It helps me access those variables easier while developing and less coding for the get(); and set(); functions. However, i think this is the wrong way of doing OOP. Any ideas? Source: Windows ..
I have this string s and t in class. class A { private: static string s; string t; public: void printString() { cout<<s<<t<<endl; } }; I tried printing these string and everytime they were empty if not initialized. So my question is whether a class string is always empty before initialization by a constructor. Also ..
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