创建新的C ++子向量？ [英] Creating a new C++ subvector?

问题描述

说我有一个值为[1,2,3,4,5,6,7,8,9,10]的向量。我想创建一个新的向量，例如[5,6,7,8]。我想象这只是一个问题，创建一个向量与指针或我必须push_back所有中间值我需要？

Say I have a vector with values [1,2,3,4,5,6,7,8,9,10]. I want to create a new vector that refers to, for example, [5,6,7,8]. I imagine this is just a matter of creating a vector with pointers or do I have to push_back all the intermediary values I need?

推荐答案

std :: vector 之一的构造函数接受一个范围：

One of std::vector's constructor accepts a range:

std::vector<int> v;

// Populate v.
for (int i = 1; i <= 10; i++) v.push_back(i);   

// Construct v1 from subrange in v.
std::vector<int> v1(v.begin() + 4, v.end() - 2);

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