Shulou(Shulou.com)05/31 Report--

This article mainly introduces the SpringBoot dynamic array class vector what is useful, has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, the following let the editor take you to understand it.

Characteristics of 1.vector

Vector is a template class that provides general functionality for dynamic arrays with the following features:

(1) the time required to add (delete) elements at the end of the array is fixed.

(2) the time it takes to add (delete) an element in the middle of an array is proportional to the number of elements that follow that element.

(3) the stored elements are dynamic, while the vector class is responsible for managing memory.

two。 Common vector operations

Here are five ways to initialize (instantiate):

# include#includeusing namespace std;int main () {/ / 1. Initialize a dynamic array dyarr1 vector dyarr1;//2. Initialize a dynamic array dyarr2 with an initial length of 10 vector dyarr2 (10); / / 3. Initialize a dynamic array dyarr3 that contains 10 elements, each of which is 1 vector dyarr3. / / 4. Copy the dynamic array dyarr3 to dyarr4 vector dyarr4 (dyarr3); / / 5. Using an iterator, copy the first five elements of dyarr4 to dyarr5 vector dyarr5 (dyarr4.begin (), dyarr4.begin () + 5); for (int iTune0)

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