使用向量的元素 [英] using the elements of a vector

问题描述

已更新:
抱歉，我认为我的问题不够清楚，因此我将问题更新为:

我有一个向量，它有5个元素

现在我该如何使用它的第二个元素，我的意思是在数组中我们可以通过[]使用它，例如:myarray [1]但在向量中我不能使用[]，我该怎么办?
在此先感谢

解决方案

使用std :: list或std:vector(向量是一个数组).标准模板库是文章(而不是论坛回复)中最好涵盖的主题.

STL 101 A部分-矢量 [ at "功能

UPDATED:
sorry,i think my question wasnt clear enough so i updated my question to this:

i have a vector and it has 5 elements

now how can i use for example second element of it,i mean in array we can use it by [] for example : myarray[1] but in vector i cant use [],what should i do?
thanks in advance

解决方案

Use std::list or std:vector ( a vector is an array ). The standard template library is a subject best covered in articles, not forum replies.

STL 101 Part A - Vector[^]

If you''re using this within a for() loop, then odds are you do know the size. Remember that you should only use a dynamic container when you need it, otherwise it will tend to make your program quite a bit slower (depending on which container you choose, the amount will vary) since dynamic memory allocations are quite costly in time.

Use "at" function of of vector class

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