Activity for Lundin
| Type | On... | Excerpt | Status | Date |
|---|---|---|---|---|
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A: In The Jailhouse Now [C (gcc)], 119 118 116 115 bytes #define p(x,y,z) printf(i^1?i^c?#z:#y:#x) i,j;f(c){for(i=1;i<=c;p(╗\n,╝\n,╣\n),i++)for(j=p(╔,╚,╠);j++<c;)p(╦,╩,╬);} Try it online! Function solution. I started with a recursive solution but it didn't work out well... though I'm still conv... (more) |
— | over 3 years ago |
| Comment | Post #283649 |
It should say "Take input of a non-negative _decimal_ integer". Also, many languages have conversion functions so this will mostly be about passing input to a conversion function and print it. Or print straight away using binary notation if the language supports it. (more) |
— | over 3 years ago |
| Comment | Post #283652 |
I'm realizing that your neat `"s"+(n<2)` trick would have shaved down my own solution quite a bit, but I'll refrain from shamelessly stealing it :) I have lots of stuff like `%.*s` `i-1?8:7,w` (print 7 characters of the string w otherwise 8) which didn't turn out too compact. (more) |
— | over 3 years ago |
| Comment | Post #283652 |
Seems we were working on this simultaneously in C but you beat me with 12 :) Completely different solutions, I went bananas on the printf format string instead. (more) |
— | over 3 years ago |
| Edit | Post #283661 | Post undeleted | — | over 3 years ago |
| Edit | Post #283661 |
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— | over 3 years ago |
| Edit | Post #283661 | Post deleted | — | over 3 years ago |
| Edit | Post #283661 | Initial revision | — | over 3 years ago |
| Answer | — |
A: 99 Shortened Bottles of Beer [C (gcc)], 244 bytes main(){for(charw=" bottles of beer on the wall",i=100;--i;)printf("%d%.s%s, %d%.s%.8s.\n%s, %d%.s%s.\n\n",i,i-1?8:7,w,w+8,i,i-1?8:7,w,w+8,i^1?"Take one down and pass it around":"Go to the store and buy some more",i^1?i-1:99,i^2?8:7,w,w+8);} Try it online! Ful... (more) |
— | over 3 years ago |
| Comment | Post #279159 |
Wouldn't each example have two answers? Since it's a quadratic equation and solving x^2 gives 2 roots. (more) |
— | over 3 years ago |
| Comment | Post #283432 |
I think `C (gcc)` already implies gcc compiler extensions. Or that's how we have been using it until now, at least. It would be cumbersome to change that now. (more) |
— | over 3 years ago |
| Edit | Post #283435 | Initial revision | — | over 3 years ago |
| Answer | — |
A: Default Rules: Extensions The `C (gcc)` implies extensions - it will only work with that specific compiler under it's default setting GNU17 (equivalent to `-std=gnu17`), which is mostly a superset of standard C. This also includes a number of POSIX functions. Another option is standard C, meaning no extensions and no const... (more) |
— | over 3 years ago |
| Comment | Post #283380 |
@#54114 Again, this is a strictly conforming solution. The includes need to be there or it won't compile. Similarly implicit int was removed from the language. (more) |
— | over 3 years ago |
| Comment | Post #283380 |
@#53588g As for the TIO, I wished to test with the worst test case that takes some serious amount of input. I couldn't be bothered to add them one by one to TIO. (more) |
— | over 3 years ago |
| Comment | Post #283380 |
@#53588 This is a strictly conforming solution, meaning it has to be fully standard compliant and with no poorly-defined behavior. It's not using gcc extensions, just standard C. (more) |
— | over 3 years ago |
| Comment | Post #282238 |
`main(){printf("$");main();}` This program creates stack overflow, takes no input from the community and gives lots of dollar signs as output for a short while, until the inevitable crash happens. On a serious note, can't we come up with something more original than copy paste of existing challenges ... (more) |
— | over 3 years ago |
| Edit | Post #283380 | Initial revision | — | over 3 years ago |
| Answer | — |
A: Coat of Many Colours C, 534 bytes Strictly conforming program. #include #include #include char i=1,c,d,t[30]={"red","yellow","green","brown","scarlet","black","ochre","peach","ruby","olive","violet","fawn","lilac","gold","chocolate","mauve","cream","crimson","silver","rose","azure","lemon"... (more) |
— | over 3 years ago |
| Edit | Post #283379 |
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— | over 3 years ago |
| Edit | Post #283379 | Initial revision | — | over 3 years ago |
| Question | — |
How to add lots of command line arguments to https://tio.run? I have a question about everyone's favourite Code Golf editor https://tio.run. After picking a language, is there a sensible way to enter command line arguments to it, other than adding them manually one by one? For one golf challenge here I need to add some 30+ arguments for testing and that quic... (more) |
— | over 3 years ago |
| Edit | Post #283353 |
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— | over 3 years ago |
| Edit | Post #283353 |
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— | over 3 years ago |
| Edit | Post #283353 | Initial revision | — | over 3 years ago |
| Answer | — |
A: Caesar shift cipher [C (gcc)], 112 bytes Function solution. p,a;f(chars,int n){a=strdup(s);for(s=a;s;s++)(p=isalpha(s)?(s&96)^96?65:97:0)&&(s=(s-p+n)%26+p);puts(a);} Try it online! Explanation: The code takes a hard copy of the passed parameter and increases each character with the value, but... (more) |
— | over 3 years ago |
| Comment | Post #282821 |
Examples like the above seem like valid clever tricks that should be encouraged rather than forbidden. (more) |
— | over 3 years ago |
| Comment | Post #282821 |
If there is to be such a rule, it needs to be more specific. In C and C++ you have various tricks such as [the #line directive](https://godbolt.org/z/nrxGaqP4W) which can be used to trick the program into thinking the file name is something else - might be handy in some scenarios. There's also the ar... (more) |
— | over 3 years ago |
| Comment | Post #282952 |
In case of the value zero specifically, `i` is guaranteed to already be zero even in strictly conforming C, since it has static storage duration. So maybe use some other number for example :) (more) |
— | over 3 years ago |
| Edit | Post #283267 | Initial revision | — | over 3 years ago |
| Answer | — |
A: Tips for golfing in C For the sake of code golf, you first need to decide if you wish to compete in strictly conforming ("real") C, in which case you can't rely on non-standard extensions, poorly-defined behavior or obsolete features. Or you can compete in non-standard extensions (gcc/GNU etc), when whatever binary the... (more) |
— | over 3 years ago |
| Edit | Post #283137 |
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— | over 3 years ago |
| Edit | Post #283137 |
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— | over 3 years ago |
| Comment | Post #283137 |
@#53588 Oh I misunderstood it then. Means I can easily shave this down some more. (more) |
— | over 3 years ago |
| Edit | Post #283138 |
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— | over 3 years ago |
| Comment | Post #283137 |
@#53588 No idea what you mean. The task is to print a string "true" or "false". (more) |
— | over 3 years ago |
| Comment | Post #283138 |
Headers would have given it away, it was already quite easy 🙂 The answer is C or C++. Compiles with gcc default settings. C++ does not need iso646.h I believe. (more) |
— | over 3 years ago |
| Edit | Post #282965 |
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— | over 3 years ago |
| Suggested Edit | Post #282965 |
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helpful | over 3 years ago |
| Edit | Post #283138 | Initial revision | — | over 3 years ago |
| Answer | — |
A: Guess the language! (Cops' Thread) C or C++ (gcc) 220 bytes, cracked by Razetime %: %: define cops(a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t) if(not false and k%:%:f%:%:d%:%:l(& (not true) )) %: main() Try it online! Output: ``` Cops and Robbers ``` Some explanation/de-obfuscation: - `%:` ... (more) |
— | over 3 years ago |
| Edit | Post #283137 | Initial revision | — | over 3 years ago |
| Answer | — |
A: It's Hip to be Square [C (gcc)], 57 64 bytes x,s;main(){scanf("%d",&x);s=sqrt(x);printf("%d",ss==x);} Try it online! (more) |
— | over 3 years ago |
| Comment | Post #282482 |
@#8046 I think the most sensible implementation would be that each community can decide which categories that should use rep or not. Meta being one (perhaps set to no rep by default?), another example is sandbox categories like here on Code Golf. (more) |
— | over 3 years ago |
| Comment | Post #282477 |
@#54114 If you post it under Code Review, there doesn't need to be a specific problem to solve. Rather you are expected to post complete & working code. If you are extra curious about for example portability or performance or style etc you can mention it in the question though, as that tells reviewer... (more) |
— | over 3 years ago |
| Comment | Post #282491 |
@#53501 Except it is listed as C (clang). And with the new scoreboard system, it bumps away all solutions that _are_ actually C (clang). (more) |
— | over 3 years ago |
| Comment | Post #282491 |
@#54114 In this case you should add the function/function-like macro used. Otherwise anyone can just use the "`M` library" from my example for any single challenge. (more) |
— | over 3 years ago |
| Comment | Post #282239 |
Couldn't we have Codidact-specific challenges. Recreating the [Mathematics logo](https://codidact.com/community-assets/math/logo-large.png) sounds like fun but tricky challenge. (more) |
— | over 3 years ago |
| Comment | Post #282482 |
@Monica Cellio Isn't the issue here rather that the various metas shouldn't count rep of the main site. The posts proposed here would sit on meta. Other than that, I don't have any problem personally with giving a lot of rep to someone who makes the effort to draft up these rules in detail per langua... (more) |
— | over 3 years ago |
| Comment | Post #282477 |
There's a lot of issues with the library - most notably you should never define functions inside header files. I'd recommend to post it for Code Review at https://software.codidact.com/categories/44 (more) |
— | over 3 years ago |