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Historically, the first extensions used for C++ were .c and .h, exactly like for C. This caused practical problems, especially the .c which didn't allow build systems to easily differentiate C++ and C files. Unix, on which C++ has been developed, has case sensitive file systems. So some used .C for C++ files.
4 avr. 2010 · I am reading a book called "Teach Yourself C in 21 Days" (I have already learned Java and C# so I am moving at a much faster pace). I was reading the chapter on pointers and the -> (arrow) operator came up without explanation. I think that it is used to call members and functions (like the equivalent of the .
3 avr. 2018 · The & operator performs a bit-wise and operation on its integer operands, producing an integer result. Thus (8 & 4) is (0b00001000 bitand 0b00000100) (using a binary notation that does not exist in standard C, for clarity), which results in 0b00000000 or 0. The && operator performs a logical and operation on its boolean operands, producing a ...
19 nov. 2015 · 3. Bonjour, c’est ou c’était est un présentatif. C’est une tournure impersonnelle dans laquelle c’ (ce) est le sujet apparent; le mot ou les mots qui le suivent constituent le sujet réel. Il arrive que l’on accorde le verbe être avec le sujet apparent dans le cas où le présentatif est directement suivi d’un pronom personnel. C ...
there are no strings in C, just character arrays that, by convention, represent a string of characters terminated by a zero (\0) character. When you pass the address of a variable to a function, you can de-reference the pointer to change the variable itself (normally variables are passed by value (except for arrays)).
Very good, but the C style pre-dates standard C, which makes it less recommendable these days. Some have argued for the removal of 'Traps and Pitfalls' from this list because it has trapped some people into making mistakes; others continue to argue for its inclusion. Perhaps it should be regarded as an 'expert' book because it requires ...
18 déc. 2009 · In C99, the C header <math.h> defines nan(), nanf(), and nanl() that return different representations of NaN (as a double, float, and int respectively), and infinity (if avaliable) could be returned by generating one with log(0) or something. There's no standard way to check for them, even in C99.
21 févr. 2009 · In the C programming language, static is used with global variables and functions to set their scope to the containing file. In local variables, static is used to store the variable in the statically allocated memory instead of the automatically allocated memory. While the language does not dictate the implementation of either type of memory ...
25 avr. 2016 · It is commonly used to create flags, numbers that can be combined together with | (bit or) and various operations can be applied to them, such as testing whether a flag is set, setting a flag, removing a flag, etc. The reason that they can be combined together without interfering with each other is that each one is a power of two, and that is ...
11 sept. 2016 · 1. In C, %[^\n] has no meaning. In the scanf formatting language (which is used by C) it means that your code has opened a very large vulnerability to an overflow exploit. Learning the scanf formatting language is not learning C. Indeed, doing so is an impediment to learning C. – William Pursell.
