矢量会动态增长 [英] will vector grow dynamically

问题描述

stl vector会自动动态增长



mfc中的CArray会不会？因为vector有SetAtGrow

stl vector will grow dynamically by it self automatically

CArray in mfc will not ? as vector has SetAtGrow

推荐答案

是和否。



如果你这样做：

Yes and No.

If you do:

std::vector<int> V;
V[7] = 123;
</int>

它会崩溃。好吧，它会给你很好的调试错误。

但是你可以这样做：

it will crash. Well, it will give you nice errors in debug.
But you can do:

V.push_back (1234);

和V将适当增长。



这与CArray非常相似。



我希望有帮助，



Iain。

and V will grow appropriately.

That's pretty similar with CArray as well.

I hope that helps,

Iain.

文档 [ ^ ]：

支持类似于C数组的数组，但可以根据需要动态地减少和增长。

The very first sentence in the documentation[^]:

Supports arrays that are like C arrays, but can dynamically reduce and grow as necessary.

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