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- What is the difference between a . cpp file and a . h file?
The cpp file is the compilation unit: it's the real source code file that will be compiled (in C++) The h (header) files are files that will be virtually copied pasted in the cpp files where the #include precompiler instruction appears Once the headers code is inserted in the cpp code, the compilation of the cpp can start
- 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, it's personal preference
- What is the difference between . cc and . cpp file suffix?
What is the difference between cc and cpp file extensions? From Google, I learned that they are both from the C++ language, but I am unsure of differences between them
- 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 prepended to
- What is the lt;= gt; (spaceship, three-way comparison) operator in C++?
This is called the three-way comparison operator According to the P0515 paper proposal: There’s a new three-way comparison operator, <=> The expression a <=> b returns an object that compares <0 if a < b, compares >0 if a > b, and compares ==0 if a and b are equal equivalent To write all comparisons for your type, just write operator<=> that returns the appropriate category type: Return
- What does the C++ standard say about the size of int, long?
I'm looking for detailed information regarding the size of basic C++ types I know that it depends on the architecture (16 bits, 32 bits, 64 bits) and the compiler But are there any standards for
- Why are #ifndef and #define used in C++ header files?
I have been seeing code like this usually in the start of header files: #ifndef HEADERFILE_H #define HEADERFILE_H And at the end of the file is #endif What is the purpose of this?
- c++ - Inheriting constructors - Stack Overflow
Constructors are not inherited They are called implicitly or explicitly by the child constructor The compiler creates a default constructor (one with no arguments) and a default copy constructor (one with an argument which is a reference to the same type) But if you want a constructor that will accept an int, you have to define it explicitly
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