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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
c++ - How do you loop through a std::map? - Stack Overflow You'll need to complete a few actions and gain 15 reputation points before being able to upvote Upvoting indicates when questions and answers are useful What's reputation and how do I get it? Instead, you can save this post to reference later
c++ faq - When do I use a dot, arrow, or double colon to refer to . . . The three distinct operators C++ uses to access the members of a class or class object, namely the double colon ::, the dot , and the arrow ->, are used for three different scenarios that are always well-defined Knowing this allows you to immediately know quite a lot about a and b just by looking at a::b, a b, or a->b, respectively, in any code you look at a::b is only used if b is a member
How to generate a random number in C++? - Stack Overflow I'm trying to make a game with dice, and I need to have random numbers in it (to simulate the sides of the die I know how to make it between 1 and 6) Using #include lt;cstdlib gt; #include lt;
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