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Forward declaration of nested types/classes in C++
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You can't do it, it's a hole in the C++ language.  You'll have to un-nest at least one of the nested classes.
    
    
        
            
            
                
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							Simple example of threading in C++
					...someone post a simple example of starting two (Object Oriented) threads in C++. 
                    
                    
                        
                            
                                
                                        7 Answers
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							How to initialize a vector in C++ [duplicate]
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With the new C++ standard (may need special flags to be enabled on your compiler) you can simply do:
std::vector<int> v { 34,23 };
// or
// std::vector<int> v = { 34,23 };
Or even:
std::vector<int> v(2);
v = { 34,23 ...				
				
				
							What is the C++ function to raise a number to a power?
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                @Marvin: Visual C++ 2010 Express has no problem with std::pow(2.0, 3).
                
– Keith Thompson
                Aug 31 '13 at 22:46
            
        
    
    
        
            
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							How should I detect unnecessary #include files in a large C++ project?
					I am working on a large C++ project in Visual Studio 2008, and there are a lot of files with unnecessary  #include  directives. Sometimes the  #include s are just artifacts and everything will compile fine with them removed, and in other cases classes could be forward declared and the #include could...				
				
				
							Using “super” in C++
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Bjarne Stroustrup mentions in Design and Evolution of C++ that super as a keyword was considered by the ISO C++ Standards committee the first time C++ was standardized.
Dag Bruck proposed this extension, calling the base class "inherited."  The proposal mentioned the multiple i...				
				
				
							Stack, Static, and Heap in C++
					... time without garbage collection.)
Personally, when I hear people say that C++ doesn't have garbage collection, my mind tags that as a feature of C++, but I'm probably in the minority. Probably the hardest thing for people to learn about programming in C and C++ are pointers and how to correctly han...				
				
				
							Struct inheritance in C++
					Can a  struct  be inherited in C++?
                    
                    
                        
                            
                                
                                        6 Answers
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							Find out if string ends with another string in C++
					How can I find out if a string ends with another string in C++?
                    
                    
                        
                            
                                
                                        20 Answers
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							Using scanf() in C++ programs is faster than using cin?
					...        6.8 seconds
iostream with sync_with_stdio(false):    5.5 seconds
C++ iostream wins!  It turns out that this internal syncing / flushing is what normally slows down iostream i/o.  If we're not mixing stdio and iostream, we can turn it off, and then iostream is fastest.
The code: https://gi...				
				
				
							