C++ version

I am currently taking the C++ courses and I am wondering which version of C++ I’am dealing with? I have seen some videos in youtube from like 2013 and when they need to print a phrase they just write cout, but in the version I am taking I need to write std::cout. How old is the version I am dealing with?

Hi @course2786670512

I don’t know specifically which version of C++ the Codecademy course uses, though I think it’s a reasonably modern variant.

In any case, I think I can explain why you’re seeing cout on it’s own in the YouTube video you’re watching but std::cout here on Codecademy.

C++ contains a standard library, but it isn’t available to your program without importing the relevant bits of it. This is why, at the start of your program, you have the #include <iostream> and similar.

<iostream> itself contains some includes, but one of the objects which it contains is the std::cout object. The reason we need to include the std:: part is because cout is an object in the std namespace. Your code will exist in a different namespace, so you need to tell C++ which namespace and object you want - hence, std::cout.

One potential reason that the YouTube tutorial you’ve been looking at can just type cout is possibly because they’ve added a line like this somewhere in their code:

using namespace std.

This brings every name from the standard namespace into the global namespace, meaning you can do stuff like cout << "Hello, world!" << endl; but this is not considered best practice.


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To add to what @thepitycoder said, you can include individual parts of the standard library rather than the entire library. Consider:

#include <iostream>
using std::cout;
using std::endl;

int main() {
  cout << "Hello, World!" << endl;
  cout << "How are you?" << endl;
  return 0;

This is kind of like a friend asking you to come over to help change a tire. No need to rent a truck, and bring every tool in your garage when all you need are a jack, and a 4-way. :slightly_smiling_face:

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that’s very helpful, thank you but is there any difference between using s::dd cout<<"\n"; and cout""<<endl; ?

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Here’s a good explanation: https://www.geeksforgeeks.org/avoid-using-stdendl/
Thanks for asking! I didn’t realize the difference could have so much potential impact prior to reading the linked article.

cstdio is kept in sync with iostream by default so you’d want to detach that as well
…I don’t see a significant difference when doing that here though, maybe I’m missing something, definitely don’t understand everything involved… maybe only for stdout/stderr/stdin? Didn’t see a difference there either though.