- Strong typedefs. - 2 Updates
- Finding string characters - 4 Updates
| Thiago Adams <thiago.adams@gmail.com>: May 19 05:54PM -0700 On Tuesday, May 19, 2020 at 6:29:43 PM UTC-3, Keith Thompson wrote: > for an existing type, not a new type. And I don't think there are > any existing features that require a warning while disallowing a > fatal error message. Yes. I did not give details but I imagine that is something not difficult to do compare with other new C++ features. This static analysis tool have this feature. https://www.gimpel.com/archive/strong.htm and it also have some interesting comments about the problem. |
| "Öö Tiib" <ootiib@hot.ee>: May 20 04:07PM -0700 On Monday, 18 May 2020 21:13:12 UTC+3, Mr Flibble wrote: > Hi! > When is C++ getting strong typedefs? I want strong typedefs! There are various implementations available, even boost contains a macro STRONG_TYPEDEF(a,b) AFAIK somewhere. I have tried such but I did not observe significant benefits from that. Same happened with enum class when used as kind of strong typedef of underlying type. Idea feels god but reality does not confirm it. |
| Barry Schwarz <schwarzb@delq.com>: May 19 06:24PM -0700 On Tue, 19 May 2020 15:21:23 -0700 (PDT), Ain? Paplauskait? >Hello! I am making Hangman game with FLTK. I have a problem - I would like my function to compare each letter of the string word_4 to a certain character(entered from input widget). For example, my string word is Please don't post the same message to multiple groups individually. If your message needs to be in multiple groups, post a single message to them by specifying the relevant groups. -- Remove del for email |
| Paavo Helde <eesnimi@osa.pri.ee>: May 20 08:05AM +0300 20.05.2020 01:21 Ainė Paplauskaitė kirjutas: > Hello! I am making Hangman game with FLTK. I have a problem - I would like my function to compare each letter of the string word_4 to a certain character(entered from input widget). For example, my string word is "sun" and I would like to compare the first letter with the entered letter(from input). So I need to compare 's' with string 's'. > There is part of the code: Your code is not complete, contains references to undefined types, does not compile and does not have a main() function. So it's hard to tell anything about this, especially given that your only complaint is "does not work". My first recommendation is to get rid of all dangerous C-style anachronisms like void* parameters, C-style arrays, strcpy(). Also raw pointers and reinterpret_cast should not be needed in such a simple program. At first glance it looks like the C-style array-decay-to-pointer misfeature is the immediate cause of your problems, so why not get rid of it and to concentrate on learning one language, not a bad mix of two. |
| "Öö Tiib" <ootiib@hot.ee>: May 19 10:17PM -0700 On Wednesday, 20 May 2020 01:21:33 UTC+3, Ainė Paplauskaitė wrote: > Hello! I am making Hangman game with FLTK. I have a problem - I would like my function to compare each letter of the string word_4 to a certain character(entered from input widget). For example, my string word is "sun" and I would like to compare the first letter with the entered letter(from input). So I need to compare 's' with string 's'. If you need to find position of char c in std::string s then why do not you use string's member find() like s.find(c) ? <https://en.cppreference.com/w/cpp/string/basic_string/find> |
| Jorgen Grahn <grahn+nntp@snipabacken.se>: May 20 05:58AM On Wed, 2020-05-20, Paavo Helde wrote: > not work". > My first recommendation is to get rid of all dangerous C-style > anachronisms like void* parameters, I bet that comes from that FLTK library or framework he's using. That's a valid use case for void* and reinterpret_cast. > array-decay-to-pointer misfeature is the immediate cause of your > problems, so why not get rid of it and to concentrate on learning one > language, not a bad mix of two. Yes; his code should leave the C world earlier; use std::vector or std::array instead of C arrays of strings; use std::string instead of C arrays of char. >> string file_4; >> string word_4; >> }; I also don't understand what the _4 suffix is doing everywhere, and why a dictionary contains 150 words, and one extra word. Ah, I think I see now -- you sometimes play Hangman with four-letter words. Shouldn't affect the naming of variables and members, though. Personally I would write classes for the core of the game and then maybe write unit tests before I wrote the UI. Something like: class Game { public: explicit Game(const string& answer); // e.g. "_oo_ar" void put(std::ostream&) const; size_t size() const; bool solved() const; // total failed guesses size_t mistakes() const; // guess that the string is s; returns // the number of errors in the guess/how much // the hanged man should grow size_t guess(const string& s); }; /Jorgen -- // Jorgen Grahn <grahn@ Oo o. . . \X/ snipabacken.se> O o . |
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