“new char []”是否需要手动释放资源？

Question

For this: m_sFilename = new char [len+1];

Should I call delete[] m_sFilename; sometime?

And:

should I use delete[] m_sFilename or delete m_sFilename; ?

Answer 1

Does "new char[]" need to be release resouces manually?

Yes.

For this: m_sFilename = new char [len+1]; Should I call delete[] m_sFilename; sometime?

Yes.

Should I use delete[] m_sFilename or delete m_sFilename; ?

delete[] .

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But you should actually use std::string , which does all this for you, and is free.

Answer 2

Yes, if you don't want the memory allocated by the new[] to leak, you should delete[] it when you're done using that memory.

To avoid having to keep track of that memory, I recommend you use std::string or std::vector instead.

Answer 3

是的，但是使用std::string来存储m_sFilename - 它几乎在所有方面都更好。

Answer 4

For native data types, and user-defined data types not having destructors using delete or delete[] would mean the same. The underlying heap manager would free all of the memory. But calling scaler delete over a vector new ( new[] ) will not make all destructors to be called. Destructor will be called only once for the very first object.

The behavior given above is compiler/heap-manager (which is handling new and delete ) dependent. For better portability use scaler delete for scaler new and vector delete ( delete[] ) for vector new .