is std:vector<char[30]> valid, or how to achieve this? (vector of fixed sized array?) [closed]

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I would like to have a notion of 2d arrays with one dimension fixed.

something like a growing list of char arrays of length 30.

Can i do something like vector is that valid, or is there a way of achieving this

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No: the type stored in a vector (or any other Standard Library container) must be both copyable and assignable. An array is neither.

You can (and should) use std::array (or, if your implementation doesn't support that, boost::array). The array class template provides a very lightweight container-like wrapper around an ordinary array; it can be used just like an ordinary array in most circumstances and has zero overhead (with a good implementation and with compiler optimizations turned on).

There is really no good reason to use an ordinary array (like char[30]) when you can use the array class template instead.

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A std::vector of std::array sounds like a better idea.