CODEWITHSUNDEEP
c++memory-management
MathematicalOrchid
MathematicalOrchid

Reputation: 62848

C++ dispose array

I was looking at another SO question, and the top-rated answer said this:

Other answers have already mentioned RAII, and that's a good answer. However, the best advice is this: don't allocate dynamic objects in the first place! Don't write

Foo * x = new Foo();

when you could just write

Foo x;

instead.

This seems like sound advice to me. Stack-based stuff already has fine and good automatic lifetime management.

My question is this: How to I apply this sound advice to something like

char * buffer = new char[1024];
stream.read(buffer, 1024);
...do stuff...
delete[] buffer;

Appologies if I'm being dumb, but how do you create arrays without using new[]?

Upvotes: 2

Views: 1438

Answers (2)

Angew is no longer proud of SO
Angew is no longer proud of SO

Reputation: 171167

If the array is fixed-size (e.g. the 1024 in your question), just this:

char buffer[1024];

Or, in C++11, the preferred:

std::array<char, 1024> buffer;

If the arrary size is only known at runtime (or if it's too big to fit comfortably on the stack), this:

std::vector<char> buffer(1024);

Upvotes: 4

Motti
Motti

Reputation: 114795

char buffer[1024];
stream.read(buffer, 1024 /* or sizeof(buffer) */);

Upvotes: 5

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