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编译错误 error: ISO C++ forbids declaration of ‘xxx’ with no type [-...
编译错误 error: ISO C++ forbids declaration of ‘xxx’ with no type [-fpermissive]error-iso-c-forbids-declaration-of-with-no-type比较可能的情况1：函数没有写返回类型，加上返回类型后编译成功。 ifndef ttTree_h define ttTree_hclass ttTree {public: ttTree(void); int ...
Why are C++ inline functions in the header?
... the fact that the inline keyword doesn't exactly do what you'd expect.
A C++ compiler is free to apply the inlining optimization (replace a function call with the body of the called function, saving the call overhead) any time it likes, as long as it doesn't alter the observable behavior of the pr...
How to find if a given key exists in a C++ std::map
... You don't need to do > 0, == 1 or != 0; that's the exact check C++ does in an if statement (condition != 0), so you can just use if(m.count(key))
– jv110
Dec 16 '16 at 20:50
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What are the differences between Generics in C# and Java… and Templates in C++? [closed]
...ant to be a list containing only Person and not just any other array list.
C++ Templates allow you to declare something like this
std::list<Person>* foo = new std::list<Person>();
It looks like C# and Java generics, and it will do what you think it should do, but behind the scenes diffe...
RAII and smart pointers in C++
In practice with C++, what is RAII , what are smart pointers , how are these implemented in a program and what are the benefits of using RAII with smart pointers?
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What exception classes are in the standard C++ library
What are the exception classes that are included in the standard C++ library, and what should they be used for? I know there are a few new C++11 exceptions, but I'm not sure what they are or where they are.
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c++ boost::multi_index composite keys efficiency - c++1y / stl - 清泛IT社区，为创新赋能！
...tainer stuff and have a rather in-depth question that hopefully a boost or C++ container expert might know (my knowledge in C++ containers is pretty basic). For reference, the boost documentation on composite keys can be found here: boost::multi_index composite keys.When using a composite key, the d...
How to throw an exception in C?
I typed this into google but only found howtos in C++,
11 Answers
11
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Private virtual method in C++
What is the advantage of making a private method virtual in C++?
5 Answers
5
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C++: const reference, before vs after type-specifier
...& (and const T*):
const T& is the style used in Stroustrup's The C++ Programming Language book.
const T& is the style used in the C++ standard itself.
const T* is the style used in K&R's The C Programming Language book.
const T* is the style used in the C standard.
Due to the above...