可以将std :: vector看作一个数组 [英] Can std::vector be treated like an array

问题描述

可以以此方式将 std :: vector< char> 视为数组：

Can a std::vector<char> be treated like an array in this way:

std::vector<char> v(10);
strncpy(&v[0], "hello", 9); // <-- Is this safe?

推荐答案

从C ++ 03起，向量需要具有连续存储。

Yes, that's fine. As of C++03, vector is required to have contiguous storage.

对于 std :: string 也是这样;您可以将 v.data（）作为& v [0] 的同义词当 v 为空）。

As of C++11, the same is true for std::string, by the way; and you can say v.data() as a synonym for &v[0] (which is also valid when v is empty).

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