将向量附加到向量 [英] Appending a vector to a vector

问题描述

假设我有2个标准向量：

Assuming I have 2 standard vectors:

vector<int> a;
vector<int> b;

让我们还说两者都有大约30个元素。

Let's also say the both have around 30 elements.

• 如何将向量b添加到向量a的末尾？

方法将通过b进行迭代，并通过向量< int> :: push_back（）添加每个元素，但我不想这样做！

The dirty way would be iterating through b and adding each element via vector<int>::push_back(), though I wouldn't like to do that!

推荐答案

a.insert(a.end(), b.begin(), b.end());

或

a.insert(std::end(a), std::begin(b), std::end(b));

第二个变体是一个更通用的解决方案，因为 b 也可以是一个数组。但是，它需要C ++ 11

The second variant is a more generically applicable solution, as b could also be an array. However, it requires C++11

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