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Bookmark or Share- c++ - 'static const' vs. '#define' - Stack Overflow#define is a compiler pre processor directive and should be used as such, for conditional compilation etc.. E.g. where low level code needs to define some possible alternative data structures for portability to specif hardware. It can produce inconsistent results depending on the order your modules are compiled and linked.
- What is the difference between #define and const? [duplicate]DEFINE is a preprocessor instruction (for example, #define x 5). The compiler takes this value and inserts it wherever you are calling x in the program and generate the object file. "Define" constants don't create a symbol entry in symbol table. If you wanted to debug the program, you would not find x. Use constant where ever possible that what ...
- Is it possible to use a if statement inside #define?As far as I know, what you're trying to do (use if statement and then return a value from a macro) isn't possible in ISO C... but it is somewhat possible with statement expressions (GNU extension).
- How to define a two-dimensional array? - Stack Overflow12. You can create an empty two dimensional list by nesting two or more square bracing or third bracket ([], separated by comma) with a square bracing, just like below: Matrix = [[], []] Now suppose you want to append 1 to Matrix[0][0] then you type: Matrix[0].append(1) Now, type Matrix and hit Enter.
- Define a preprocessor macro through CMake - Stack Overflow1.) target_compile_definitions. If you are using CMake 3.X your first choice for adding a preprocessor macro should be target_compile_definitions. The reason you should prefer this approach over any other approach is because it granularity is target based. IE the macro will only be added to your exe/library.
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