What is the role of preprocessor directives in c program? What if, we don't use it?
What is the role of preprocessor directives in c program? What if, we don't use it?
Cross-posted
the role of preprocessor directives in c - C++ Forum
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
If at first you don't succeed, try writing your phone number on the exam paper.
Preprocessor is a part of <<snipped spammy URL>> and are executed before compilation. This is a macro processor, which is used automatically by the C compiler to transform your program before actual compilation.
In simple words, preprocessor directives tells the compiler to preprocess the source code before compiling. All the preprocessor commands are begin with "#" symbol.
The most common use of the preprocessor is to include header files. In C and C++, all symbols must be declared in a file before they can used. They don’t always need to be defined*, but the compiler needs to know they exist somewhere. A preprocessor is just another technique to help a programming language be more useful. There are numerous techniques available and every language designer must choose the ones they like.
I smell a rat.
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
If at first you don't succeed, try writing your phone number on the exam paper.
