Size of a empty Class & Derived Virtual Class

Size of a empty Class & Derived Virtual Class

Content Index :

Size of a empty Class & Derived Virtual Class
Tag : cpp , By : pjkinney
Date : November 24 2020, 03:41 PM

No Comments Right Now !

Boards Message :
You Must Login Or Sign Up to Add Your Comments .

Share : facebook icon twitter icon

why size of extreme down Derived class (multiple virtual inheritance) includes two times of size of member of superclass

Tag : cpp , By : Lathentar
Date : March 29 2020, 07:55 AM
To fix this issue 24 is probably:
4 for Sb 4 for a 4 for b 4 for c 8 for the overhead of virtual inheritance.

size of derived class in virtual inheritance

Tag : cpp , By : cameron
Date : March 29 2020, 07:55 AM
this one helps. Virtual inheritance means, that the virtual base classes only exist once instead of multiple times. That is why the 8 bytes from ClassA are only in ClassD once. Virtual inheritance itself requires a certain overhead and hence you get an additional pointer. The exact implementation and therefore the exact overhead is not specified by the C++ standard and may vary depending on the hierarchy you are creating.

Why the virtual destructor in derived class is empty?

Tag : cpp , By : mckasty
Date : March 29 2020, 07:55 AM
This might help you I have one question, I see that in some codes, the virtual destructor in derived class is empty, then why we need it since it does nothing? Is it used to call the destructor in base class and without it, the destructor cannot be called? or it is just a notation to tell the code reader that this destructor is virtual which makes code much easier to read? ! ,
why we need it since it does nothing?

Derived class VTable having only base class virtual functions. The derived class virtual functions are missing from deri

Tag : cpp , By : Tim Coffman
Date : March 29 2020, 07:55 AM
it fixes the issue Here you have different function overloads that do not override the defined virtual functions:
virtual void sayHi() const {}
virtual void sayHello() {}

void sayHi() {}  // non virtual function with a different signature (no const)
void sayHello() const {} // non virtual function with a different signatuere (const)

Size of most derived class in virtual inheritance

Tag : cpp , By : SilverRuby
Date : September 30 2020, 08:00 PM
like below fixes the issue
I think because we have virtual base class so there should be only one instance of A.
Related Posts Related QUESTIONS :
  • Scope a using declaration, inside a header
  • How to specify constructor's template arguments inside a new expression?
  • Sort an array via x86 Assembly (embedded in C++)?? Possible?
  • How to Replace only Part of the Variable using #define
  • How do you compare the performace of valarrays vs built-in arrays?
  • Is it normal for C++ static initialization to appear twice in the same backtrace?
  • c++ generate a good random seed for psudo random number generators
  • Why isn't my operator overloading working properly?
  • Getting meaningful error messages from fstream's in C++
  • C++: Converting Julian dates to Gregorian
  • Could someone explain this interesting behaviour with Sleep(1)?
  • Is it possible to roll a significantly faster version of modf
  • Updating pointer using signals and slots
  • How are classes more secure than structures?
  • finding "distance" between two pixel's colors
  • C++ Greatest Number Verification
  • Why does my token return NULL and how can I fix it?(c++)
  • C++ enforce conditions on inherited classes
  • what happened if an exception is not captured?
  • Redundant naming in C/C++ typedefs/structs
  • question about STL thread-safe and STL debugging
  • killing a separate thread having a socket
  • Returning the size of available virtual memory at run-time in C++
  • Parallel computing for integrals
  • How do I force my std::map to deallocate memory used?
  • C++ Templates: implicit conversion, no matching function for call to ctor
  • Adding python script to c++ project
  • C++ private pointer "leaking"?
  • Initializing Primitive Array to One Value
  • how is push_back implemented in STL vector?
  • C++ Profiling: KiFastSystemCallRet
  • Multiple rows with a single INSERT in SQLServer 2008
  • Use super class's address/pointer in initialization list
  • double fork using vfork
  • Convert char pointer (char*) to struct
  • Does anyone have good tips for using pc-lint?
  • C++ How fast is passing around objects?
  • template type's ctor arguments at instantiation time
  • Get list of windows in taskbar on Windows 7?
  • Curl connection options
  • Best cross-platform solution for network server?
  • simple c++ file opening issue
  • Switching from C++ (with a lot of STL use) to C for interpreter building
  • How can I access the JPEG image pixels as a 3D array like we do in MATLAB?
  • What wording in the C++ standard allows static_cast<non-void-type*>(malloc(N)); to work?
  • Avoid allocating in constructor or preserve simplicity (and RAII?)
  • Can C++ raise an error when std array initialization is too small?
  • Reference to end is ambiguous
  • Problem with basic usage of std::enable_if
  • How to print out a decimal number as octal number using setiosflags in C++
  • Open Visual Studio with solution and specific file and line
  • Enum value based on template type
  • Is there any way to swap nodes in std::list?
  • How to copy QString into wchar_t buffer
  • Make the compiler generate an empty default function for an std::function
  • Insert or push_back to end of a std::vector?
  • Best practice for const temporary types
  • Include CSV File in Complied Binary
  • Issue with binding non static function to callback
  • How can read from some files and write content of them with different form into files with same names
  • shadow
    Privacy Policy - Terms - Contact Us © scrbit.com