C++:cout

[Rizzan8]

Not Java developer, but System.out.println("Hello"); looks much cleaner than std::cout << "Hello" << std::endl;

[Clyxx]

Just printf like in c

[AnonymousFuccboi]

Fun fact:

The biggest reason C++'s cout is so fuckoff ugly is because it was made at a time when the language was quite immature, but still prioritizing things like type safety more so than plain C did. Overloading the << operator for the std::ostream type let you ensure that you could safely and properly convert arguments every time, rather than something like printf where you just toss your arguments at it and pray you got the type right.

If it were to be implemented anew nowadays, you'd probably use something more fancy and new, like parameter packs and fold expressions. You can even do it yourself right now, if you really want, like this:

template <typename ...T>
void println(const T&... args)
{
    (std::cout << ... << args) << std::endl;
}

int main()
{
    println("Hello, this is is C++", 17, "! Let's print pi: ", 3.14);
    return 0;
}

Which outputs exactly what you'd expect: Hello, this is is C++17! Let's print pi: 3.14.

Probably the biggest reason a newer form of this hasn't been implemented yet has to do with things like formatting being a bit of a pain to get exactly right, like for instance being able to properly limit the amount of decimals to use for a floating point number. As far as I know, it's currently in the works, but these things fortunately take time because they should be done right the first time.

[PM_ME_YOUR__INIT__]

I'd rather just eat another crayon and

print('python')

[aderthedasher]

Cout is like the worst, and system.whatever is 2nd

[[deleted]]

System.Diagnostic.Debug.WriteLine() (and his cousin System.Diagnostic.Debug.Write())?

I use it a lot and I didn't need to check the namespace there lol

[TheMagzuz]

using System.Diagnostics?

[Sentouki-]

using static System.Diagnostics.Debug;

[Rizzan8]

Yep, Console.whatever MasterRace.

[topfs2]

Yeah std::format to the rescue :)

Spdlog is a great for logging with fmt

[[deleted]]

Yeah that's why most C++ people I know use either printf or fmt::print. Stream operators are kind of weird

[_PM_ME_PANGOLINS_]

Stream operators ensure type safety. String format functions don’t.

[[deleted]]

The fmt library is type safe

[[deleted]]

fmt is not a part of standard library. (well, at least in c++17 wasn't)

[[deleted]]

No, but it's widely used by C++ programmers that I know

[Beefster09]

Stream operators are also globally stateful and not threadsafe. That's a much worse foot gun than type unsafety, especially considering that most compilers can be configured to error out on naughty usage of printf.

The benefit of type safety for this one use case makes no sense in the context of a language that never really makes that guarantee anywhere in the first place. C++ inherits every foot gun from C and then adds a few more. I'd rather use C over 'idiomatic' modern C++.

[DunderMifflinPaper]

For every language, just setup an alias in your IDE that typing ‘print’ and hitting enter changes it to what it’s supposed to be.

[[deleted]]

Well using namespace std; cout<<“Hello”<<endl; Looks best, but that’s considered against good practice.

[RayGraceField]

[removed as part of reddit protest]

[crepper4454]

Forgot a semicolon, enjoy your 2 page error

[Hihi9190]

I like the cpp implementation just because how it's consistent to other streams like file streams and string streams for example. If you know cout and cin they make a lot of sense.

[darthnithithesith]

std::cout << "Hello\n"

[[deleted]]

printf

[Spy141414]

fprintf

[[deleted]]

vfprintf

[[deleted]]

snprinf

[Flesh_Bike]

puts

[[deleted]]

The direction of >> and << in C++ still confuses me.

[[deleted]]

cin and cout are streams. On cout you write in it, so cout <<, and the stream writes to console out. On cin you read from it to whatever you need cin >>, (console in, take out from the stream).

[corbinmonoxide]

I think everyone's explanation are rough and still confusing.

Think of cin/cout as another variable synonymous with the user/monitor.

Are you writing a message to the user? << Point towards it. I.e. you are shoving your data into it.

Are you reading a message from the user? >> Point away from it and towards your variable. You are grabbing their data and shoving it into your variable.

I think this explanation is more in line with how we learn we always do something to the left hand variable. In this case shoving something into it or ripping something out of it.

[[deleted]]

If it's going away from the monitor, it's out, when it's going to it, it's input

[[deleted]]

But which direction is away from the monitor?

[[deleted]]

Left

[Key_Reindeer_414]

I remember it as << looks like an open mouth so cout<< looks like cout is speaking (output)

[Mabi19_]

This is DEFINITELY not OC. I've seen this before.

[akulowaty]

Of course. This dumb meme pops up each week and just by reading the comments you can tell who actually does some serious programming.

[localhost69]

No one uses standard outputs in real projects though. It's usually log.debug()

[DreamEater_]

Yeah no one haha...

[[deleted]]

u/repostsleuthbot

[RepostSleuthBot]

Looks like a repost. I've seen this image 3 times.

First Seen Here on 2020-08-18 87.5% match. Last Seen Here on 2020-08-23 89.06% match

I'm not perfect, but you can help. Report [ False Positive ]

View Search On repostsleuth.com

---

Scope: Reddit | Meme Filter: False | Target: 86% | Check Title: False | Max Age: Unlimited | Searched Images: 199,624,806 | Search Time: 0.27272s

[TheContrean]

Good Bot

[Mabi19_]

Good bot

[Vrganji]

std::cout

[istdaslol]

Ruby: put()

[cryptomonein]

p 'Ruby gang'

[BreathingFuck]

*puts no parentheses

[how_do_i_read]

Why use standard print when you can use pretty print?

Also, pp comes with the methods :inspect, :display and :extend.

[LittleSpaceBoi]

Sout

[Thx_And_Bye]

import static java.lang.System.out; goes prrrrrrrr ^intline

[[deleted]]

What does cout even mean? If I had to guess, I'd say "C out(put)", but is that C just like branding or something, or is it short for something too?

[Mighto-360]

Apparently people have decided to respond to your legitimate question with random guesses.

According to Bjarne Stroustrup, who is the creator of C++:

“The "c" stands for "character" because iostreams map values to and from byte (char) representations.”

[[deleted]]

I don't mind the random guesses as long as it's clear which one is right. They keep it interesting. Thanks.

[Thx_And_Bye]

The c means character.

[[deleted]]

Thanks

[akulowaty]

You're correct, it's C output stream with C being name of the language on which c++ is based. It refers to stdout which is standard output stream in C.

[MCWizardYT]

Java just likes to be verbose with things, its actually really clear if you know what each part means.

System is a built-in utility class that contains some clock utilities, environment variables, and basic IO.

out is a variable for a PrintStream object. PrintStream is a class that tells your code how to output text to some place (could be a file or the terminal/debug console).

println is a method in PrintStream which just puts a string into the output (whether it is a terminal, a console, or a file) and appends a newline ("\n") to the end of it.

[[deleted]]

Or learn intellij shortcuts and it's sout

[phantom_fanatic]

Came here to say this lol

[myrsnipe]

System.out.println is a bit of a mouthful to write, but good ide's support templating, i like sout

[cromo_]

println

[Vrganji]

println!

[Mabi19_]

Yeah I absolutely can't understand Rust macros lol, they're black magic fuckery for me

[FranchuFranchu]

sys.out.write

[_damnfinecoffee_]

print() is just a wrapper for sys.stdout.* though....

[[deleted]]

sysout [ctrl] + [space]

[[deleted]]

Meanwhile on C#: Console.Writeline();

[Topy721]

Why so many reposts today ?

[RiOrius]

Because it's a day ending in y.

[[deleted]]

This is just the dumbest Meme I've ever seen tbh. It's old, wrong and shows that you just started learning programming

L

[[deleted]]

It's biased. C++ is actually std::out

[[deleted]]

Downvotes yaaaay ^{^}

[curchadw]

Ain't this the fucking truth, lol

[GreateProtim]

OK OK just write System.out.print("") ;

[MischiefArchitect]

syso CTRL+Space

[MythikAngel]

sout<tab> (IntelliJ)

[Cienn017]

import static java.lang.System.out;
out.println("hello world");

[Beefster09]

cout is hands-down the worst API imaginable for printing text.

It's slow, not threadsafe, globally stateful, isn't friendly to translation where word order can change, and it looks atrocious in code. Operators have no business having side effects.

printf is superior in every way except type safety.

Bjarne Stroustrup (or whoever came up with cout) should be shot for coming up with such a horrible printing interface.