如何在C ++中调整数组大小？ [英] How to resize array in C++?

问题描述

可能重复：

您可以在初始化后调整C ++数组的大小吗？

我需要在C ++中做相当于下面的C＃代码

I need to do the equivalent of the following C# code in C++

Array.Resize(ref A, A.Length - 1);

如何在C ++中实现？

How to achieve this in C++?

推荐答案

数组的大小在C ++中是静态的。您不能动态调整它的大小。这就是 std :: vector is for：

The size of an array is static in C++. You cannot dynamically resize it. That's what std::vector is for:

std::vector<int> v; // size of the vector starts at 0

v.push_back(10); // v now has 1 element
v.push_back(20); // v now has 2 elements
v.push_back(30); // v now has 3 elements

v.pop_back(); // removes the 30 and resizes v to 2

v.resize(v.size() - 1); // resizes v to 1

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