C++, my first program

[red sorrel]

In my class I was thought to use

#include <iostream>
using namespace std;

int main() {
    cout << "Hello, world!";
    return 0;
}

To write my first program

And when I went on YouTube for more tutorials I saw to use the method in the picture below and I’m confused??

[loud silo]

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[hazy gazelle]

the image shows a C program, you are writing C++

[red sorrel]

Yes but I was thought to coding like this

#include <iostream>
using namespace std;

int main() {
    cout << "Hello, world!";
    return 0;
}

[hazy gazelle]

yes , this is how you write a simple hello world program in C++ , you are correct

[red sorrel]

So do I need to learn both methods ?

[hazy gazelle]

no, in the image you posted , they are using C , they are not using C++

you dont need to learn how to write C code

Even though almost* all C code is valid in C++, C and C++ are both different languages and you do stuff differently in both languages.

you dont need to worry about stdio.h or printf

those are C language things , not C++

they are valid in C++ only because C++ is supposed to be superset of C

[fiery granite]

for now you don’t

[red sorrel]

Oh, thanks for the clarification

[fiery granite]

almost *

[terse ocean]

I don't recommend using using namespace std; fwiw

[fiery granite]

just make the lecturer happy and not use it anywhere else

[terse ocean]

In C++23 (modern C++) you can use this instead even:

#include <print>
int main()
{
     std::print("Hi!");
}```

It's simpler, modern and more intuitive

[fiery granite]

C++ the modern way can feel very nice to get started with

[terse ocean]

If you don't have access to modern C++ (or your lecturer just sucks and doesn't know any better) you can keep using the old and confusing method

#include <iostream>
int main()
{
     std::cout << "Hi!";
}``` of course

Formatting arguments is also much more intuitive in C++23 than it was in previous standardisations, so I recommend using std::print so you don't get too confused :D

Modern: std::println("MyInt = {}, something in hex = {:x}, aligned 3rd arg with fixed width of the 4th arg: {: >{}}", number1, number2, number3, width);
Old: std::cout << number1 << std::hex << number2 << std::dec << std::setfill(' ') << std::setw(width) << number3 << '\n';
C: cursed

[fiery granite]

or give up doing iostreams and use printf 🙂

[olive thicket]

C is not cursed, it's just not C++

Besides, why don't we use the import since we're using modern C++ now?

[terse ocean]

Okay then write the equivalent in C

[loud silo]

@red sorrel Has your question been resolved? If so, type !solved :)

[red sorrel]

Solved

[exotic ore]

bro just use ai already