Question: I posted a question with my code whose only #include directive was the following: My teacher told me to do this, but in the comments section I was informed that I shouldn’t. Why? Best Answer: Including <bits/stdc++.h> appears to ...

Question: I want to understand the external linkage and internal linkage and their difference. I also want to know the meaning of const variables internally link by default unless otherwise declared as extern. Best Answer: When you write an implementation ...

Question: I often find myself in a situation where I am facing multiple compilation/linker errors in a C++ project due to some bad design decisions (made by someone else 🙂 ) which lead to circular dependencies between C++ classes in ...

Question: This question was already asked in the context of C#/.Net. Now I’d like to learn the differences between a struct and a class in C++. Please discuss the technical differences as well as reasons for choosing one or the ...

Question: What is copy elision? What is (named) return value optimization? What do they imply? In what situations can they occur? What are limitations? If you were referenced to this question, you’re probably looking for the introduction. For a technical ...

Question: Someone brought this article to my attention that claims (I’m paraphrasing) the STL term is misused to refer to the entire C++ Standard Library instead of the parts that were taken from SGI STL. (…) it refers to the ...

Question: C++ inherited arrays from C where they are used virtually everywhere. C++ provides abstractions that are easier to use and less error-prone (std::vector<T> since C++98 and std::array<T, n> since C++11), so the need for arrays does not arise quite ...

Question: I heard a few people recommending to use enum classes in C++ because of their type safety. But what does that really mean? Best Answer: C++ has two kinds of enum: enum classes Plain enums Here are a couple ...

Question: I just found a comment in this answer saying that using iostream::eof in a loop condition is “almost certainly wrong”. I generally use something like while(cin>>n) – which I guess implicitly checks for EOF. Why is checking for eof ...

Question: Many C++ books contain example code like this… …so I’ve always done that too. But I’ve seen a lot of code from working developers like this instead: Is there a technical reason to prefer one over the other, or ...