C++ Class 1. [11.1 - Using #ifndef] In order to prevent yourself from accidental
ID: 3585482 • Letter: C
Question
C++ Class
1. [11.1 - Using #ifndef]
In order to prevent yourself from accidentally telling c++ to define the InvItem class multiple times, we use preprocessor statements (directives). These statements are read prior to compilation, which is why we are unable to overload the # operator.
1. [11.1 - Using #ifndef]
In order to prevent yourself from accidentally telling c++ to define the InvItem class multiple times, we use preprocessor statements (directives). These statements are read prior to compilation, which is why we are unable to overload the # operator.
What three preprocessor statements need to be added to the interface file InvItem.h in order to prevent the InvItem class from being defined multiiple times accidentally?
Where do these lines appear in the interface file?
Explanation / Answer
Hi,
#ifndef is used to prevent multiple declarations of a same MACRO,FILE or variable, The preprocessor determines if the provided macro does not exist before including the subsequent code in the compilation process.
It works like this,
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