Search results
- Dictionaryhave/hav/
verb
- 1. possess, own, or hold: "he had a new car and a boat" Similar Opposite
- 2. experience; undergo: "I went to a few parties and had a good time" Similar
auxiliary
- 1. used with a past participle to form the perfect, pluperfect, and future perfect tenses, and the conditional mood: "I have finished"
noun
- 1. people with plenty of money and possessions: informal "an increasing gap between the haves and have-nots"
- 2. a swindle. informal, dated British
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Dec 21, 2011 · There is no concept of types within the preprocessor. Suppose that you have the following lines in your source file: #define MAXLINE 5000. int someVariable = MAXLINE; // line 2. char someString[] = "MAXLINE"; // line 3. The preprocessor will detect the macro MAXLINE on line 2, and will perform a text substitution.
Jan 2, 2018 · Java doesn't have a general purpose define preprocessor directive. In the case of constants, it is recommended to declare them as static finals, like in. private static final int PROTEINS = 100; Such declarations would be inlined by the compilers (if the value is a compile-time constant).
Nov 27, 2015 · The #define directive has two common uses. The first one, is control how the compiler will act. To do this, we also need #undef, #ifdef and #ifndef. (and #endif too...) You can make "compiler logic" this way. A common use is to activate or not a debug portion of the code, like that: #ifdef DEBUG. //debug code here.
3. #ifndef checks whether the given token has been #defined earlier in the file or in an included file; if not, it includes the code between it and the closing #else or, if no #else is present, #endif statement. #ifndef is often used to make header files idempotent by defining a token once the file has been included and checking that the token ...
Jul 9, 2013 · 5. You can only #define one item per line. But please consider not using #define s at all. A naieve approach would be to use static const s: static const bool In = true, On = true, Up = true; static const bool Out = false, Off = false, Down = false; A better approach would be to out these in an unnamed namespace: namespace.
Oct 30, 2013 · 14. In C# #define macros, like some of Bernard's examples, are not allowed. The only common use of #define / #if s in C# is for adding optional debug only code. For example: static void Main(string[] args) //this only compiles if in DEBUG. Console.WriteLine("DEBUG") //this only compiles if not in DEBUG.
I use macros with conditions quite a bit and they do have a legit use. I have a few structures that are essentially blobs and everything is just a uint8_t stream. To make internal structures more readable I have conditional macros. Example... #define MAX_NODES 10 #define _CVAL16(x)(((x) <= 127) ?
Jul 12, 2011 · 12. 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.
Feb 18, 2011 · If the code can be compiled as C99 code, you can define a variadic macro. #define my_printf(str, args...) _my_printf(x, str, ##__VA_ARGS__) The preprocessor will replace the arguments ... and the GNU preprocessor will remove the trailing comma in case the macro is invoked only with the str argument.
May 15, 2011 · In C constants have external linkage and thus should be defined in .c files. In C++ they have internal linkage and thus could be defined in header. So, agree with @Neil if C++ and not C. (The question relates to magic numbers in header, so I disagree with other tangents for #define as used for include guards or any non-magic-number discussion.)
