c++ vector constructor
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What is the difference between default Vector constructor and copy constructor?
答：The default vector constructor takes no arguments, creates a new instance of that vector. The second constructor is a default copy constructor that can be used to create a new vector that is a copy of the given vector c. The third constructor creates a vector with space for num objects.
Can you construct a vector of vectors in C++?
答：That’s all about constructing a vector of vectors in C++. Average rating 4.49 /5. Vote count: 43 Thanks for reading. Please use our online compiler to post code in comments using C, C++, Java, Python, JavaScript, C#, PHP, and many more popular programming languages.
What is the purpose of the second constructor of a vector?
答：The second constructor is a default copy constructor that can be used to create a new vector that is a copy of the given vector c. The third constructor creates a vector with space for num objects. If val is specified, each of those objects will be given that value.
How to construct a std-vector class?
答：std::vector class can be constructed in many different ways. Use the button in the top-right corner to navigate with arrows for convenience. std::vector is a class template, with following type parameters, that are used within constructors: constructor 1) is noexcept if constructor of the Allocator is noexcept as well
