Description: Undef is a preprocessor directive in C++ that allows the removal of a previously defined macro. Its use is fundamental in macro management, as it helps avoid conflicts and redefinitions that can arise in projects or in libraries that integrate with other code. By using ‘undef’, programmers can ensure that a macro is not defined before its use, which helps maintain clarity and organization in the code. This directive is especially useful in situations where macros may be defined in different header files or in different parts of the code, allowing for more precise control over the compilation environment. The syntax is simple: the keyword ‘undef’ is followed by the name of the macro to be removed. This feature not only improves code readability but also prevents compilation errors that can arise from conflicting definitions, making the development process more efficient and less prone to failures.
