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Just
puts(“I’m a teapot”);:)Maybe c# has similar. There’s \r\n or \n like c++ and Environment.NewLine.
Probably it’s similar in that Environment.NewLine takes into account the operating system in use and I wonder if endl in c++ does the same thing?
C# also has verbatim strings, in which you can just put a literal newline.
string foo = @"This string has a line break!";
As long as it doesn’t end in ;
No debate, std::endl can be a disaster on some platforms due to flushing crap all the time.
Just because the box says something is flushable doesn’t mean you should flush it.
It’s a very C++ thing that the language developers saw the clusterfuck that is stream flushing on the kernel and decided that the right course of action was to create another fucking layer of hidden inconsistent flushing.
I hear C++ was greatly inspired by the fifth circle of hell.
If
endlis a function call and/or macro that magically knows the right line ending for whatever ultimately stores or reads the output stream, then, ugly though it is,endlis the right thing to use.If a language or compiler automatically “do(es) the right thing” with
\nas well, then check your local style guide. Is this your code? Do what you will. Is this for your company? Better to check what’s acceptable.If you want to guarantee a Unix line ending use
\012instead. Or\cJif your language is sufficiently warped.It’s a “stream manipulator” function that not only generates a new line, it also flushes the stream.
Doesn’t endl predate C++?
It’s not in C, if that’s what you mean.
deleted by creator
Wasn’t this {fmt} library merged into STL now? Does this solve this issue?
Anyways, there was also a constant that is the OS line ending without a flush, right?
C++ style text streams are bad and a dead-end design and
'\n'.std::cout << "\nwhy not both" << std::endl;In PHP it exists as well. I try to use PHP_EOL but when I’m lazy I simply do “\n”.
For me the answer is “Building backend applications with it instead of CLI applications, like Lerdorf intended.”
But also
"\n"because it’s easier andPHP_EOLis just an alias for"\n"; it’s not even platform-dependent.PHP_EOL depends on your host system, it’s
\r\non Windows.I don’t really want to use what Lerdorf intended, PHP <= 4 was horrible, 5.x was mainly getting slowly rid of nonsense and with 7.x PHP started its slow path of redemption and entered its modern era.
While Lerdorf’s vision was great at that time for its intended use case, I wouldn’t want to build anything serious in it.
It actually outputs
"\n"on a Windows system, but modern Windows to recognise that as enough of a newline, nowadays.I don’t really want to use what Lerdorf intended, PHP <= 4 was horrible
Actually a great point!
I am very sorry to remind everyone about the existence of Visual Basic, but it has:
- VbCrLf
- VbNewLine
- ControlChars.CrLf
- ControlChars.NewLine
- Environment.NewLine
- Chr(13) & Chr(10)
And I know what you’re asking: Yes, of course all of them have subtly different behavior, and some of them only work in VB.NET and not in classic VB or VBA.
The only thing you can rely on is that “\r\n” doesn’t work.
I prefer \n for 0.001% better performance
I prefer \n for less typing.
printfis superior and more concise, andsnprintfis practically the only C string manipulation function that is not painful to use.Try to print a 32-bit unsigned int as hexadecimal number of exactly 8 digits, using
cout. You can dostd::hexandstd::setw(8)andstd::setfill('0')and don’t forget to usestd::decafterwards, or you can just, you know,printf("%08x")like a sane person.Just don’t forget to use
-Werror=formatbut that is the default option on many compilers today.C++23 now includes
std::printwhich is exactly likeprintfbut better, so the whole argument is over.I went digging in cppref at the format library bc I thought c++20 or c++23 added something cool.
Found
std::printand was about to reply to this comment to share it bc I thought it was interesting. Then I read the last sentence.Darn you and your predicting my every move /j
Simple.
\nwhen you just want a newline.
endlwhen you need to flush at the moment.Useful in case you are printing a debug output right before some function that might do bed stuff to buffers.
Edit: I wrote
printlninstead ofendlsomehow. Guess I need more downtimeI only program in C. I was under the assumption that \n also flushes
I remember having to
fflusha couple of times.
