compiler-warning-level-1-c4142.md

description	title	ms.date	f1_keywords	helpviewer_keywords	ms.assetid
Learn more about: Compiler Warning (level 1) C4142	Compiler Warning (level 1) C4142	11/04/2016	C4142	C4142	1fdfc3dc-60a2-4f00-b133-20e400f9b7a6

Compiler Warning (level 1) C4142

benign redefinition of type

A type is redefined in a manner that has no effect on the generated code.

To fix by checking the following possible causes:

• A member function of a derived class has a different return type from the corresponding member function of the base class.

• A type defined with the typedef command is redefined using different syntax.

The following sample generates C4142:

// C4142.c
// compile with: /W1
float X2;
X2 = 2.0 + 1.0;   // C4142

int main() {
   float X2;
   X2 = 2.0 + 1.0;   // OK
}