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  1. C++ code file extension? What is the difference between .cc and .cpp

    95 .cpp is the recommended extension for C++ as far as I know. Some people even recommend using .hpp for C++ headers, just to differentiate from C. Although the compiler doesn't care what you do, …

  2. What is the meaning of prepended double colon - Stack Overflow

    I found this line of a code in a class which I have to modify: ::Configuration * tmpCo = m_configurationDB;//pointer to current db and I don't know what exactly means the double colon …

  3. O que são os arquivos com extensão .cpp e .h?

    Sep 26, 2017 · Arquivos .cpp são os arquivos que contém os fontes das implementações em C++. Arquivos .h são chamados de headers, usado para extrair a declaração de funções, classes e outras …

  4. What is the purpose of using #ifdef and #if in C++?

    The meaning of #ifdef is that the code inside the block will be included in the compilation only if the mentioned preprocessor macro is defined. Similarly, #if means that the block will be included only if …

  5. c++ - How do I find the length of an array? - Stack Overflow

    Is there a way to find how many values an array has? Detecting whether or not I've reached the end of an array would also work.

  6. Why can templates only be implemented in the header file?

    Jan 30, 2009 · Have to recompile foo.cpp every time we change any other file in the program, in case it added a new novel instantiation of MyClass<T> Require that baz.cpp contains (possibly via header …

  7. Visual Studio Code: How to configure includePath for better ...

    Sep 17, 2017 · From the official documentation of the C/C++ extension: Configuring includePath for better IntelliSense results If you're seeing the following message when opening a folder in Visual …

  8. visual studio - C++ cannot open source file - Stack Overflow

    There is more information here on how to deal with this problem: Where does Visual Studio look for C++ header files? For me, I followed xflowXen's answer and then at "Include Directories" typed in the …

  9. c++ - Does true equal to 1 and false equal to 0? - Stack Overflow

    Mar 5, 2022 · bool does NOT have an integral value. C++ mandates that when converting bool to integral types true evaluates to 1 and false evaluates to 0, and from integral/float types it says that a …

  10. What is an 'undeclared identifier' error and how do I fix it?

    Mar 5, 2014 · A very common case is including <iostream> and trying to use std::string without having <string> included. May be worth mentioning.