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- c++ - Difference between | and || , or and - Stack Overflow
Closed 9 years ago These are two simple samples in C++ written on Dev-cpp C++ 5 4 2:
- 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 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 the expression evaluates to true (when replacing undefined macros that appears in the expression with 0) One important point here is that the preprocessor processes the source before it's
- What does the :: mean in C++? - Stack Overflow
What does this symbol mean? AirlineTicket::AirlineTicket ()@PaulR Not everyone who arrives upon this question is looking to learn C++ I, for example, just happened to be skimming some C++ code and wanted to get the general idea of what the program is doing and needed a quick reference :)
- Regular cast vs. static_cast vs. dynamic_cast - Stack Overflow
I've been writing C and C++ code for almost twenty years, but there's one aspect of these languages that I've never really understood I've obviously used regular casts i e MyClass *m = (MyClass
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