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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
- 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
- c++ - How to check if a string contains a char? - Stack Overflow
And even if you used size_t, if the character is not found, your code would invoke undefined behaviour since string::find returns string::npos and you use it to index the string in the if statement using string::operator[], which is defined behaviour only if its index is between 0 and string length (see documentation for details) You should instead just check whether the index is npos as in
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