Was this page helpful?
Your feedback about this content is important. Let us know what you think.
Additional feedback?
1500 characters remaining
Compiler Warning (level 4) C4623
Collapse the table of content
Expand the table of content

Compiler Warning (level 4) C4623

'derived class' : default constructor could not be generated because a base class default constructor is inaccessible

A constructor was not accessible in a base class and was therefore not generated for a derived class. Any attempt to create an object of this type on the stack will cause a compiler error.

This warning is off by default. See Compiler Warnings That Are Off by Default for more information.


The following sample generates C4623.

// C4623.cpp
// compile with: /W4
#pragma warning(default : 4623)
class B {

class C {

class D : public B {};   // C4623 make B's constructor public
class E : public C {};   // OK

int main() {
   // D d;  will cause an error

Community Additions

© 2015 Microsoft