Why does C++ not support Variable-length arrays?

Question

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Variable length arrays in C++?

I am just curious, is there any particular reason why C++ does not allow variable length arrays?

Answer 1

What about std::vector?

edit: sorry I missundertood your question.

Answer 2

Two reasons:

1. C++ is based on C89 (the C standard as published in 1989). VLAs were only introduced in C99.
2. C++ has std::vector<> and a whole bunch of other containers, which is why I believe that C++ will never bother with VLAs. It already had them when VLAs were invented for C.

Answer 3

The STL includes a Vector class to use. Technically, you could use an array whose index variable is a pointer, leading to a "variable length" array.