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Editorial Team
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Asked: 2026-05-27T05:29:39+00:00

Can a std::vector<char> be treated like an array in this way: std::vector<char> v(10); strncpy(&v[0],

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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?
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  1. Editorial Team

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

    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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