C++ Vector Usage Guide

In C++, a vector is a dynamic array container that can store data of any type, providing a set of methods for easily manipulating and managing the data.

Here are common usages of the vector container.

1. Create a vector object:
2. std::vector numbers; // Create a vector object to store integers
   std::vector names; // Create a vector object to store strings
3. Add elements to the vector.
4. Add elements 10, 20, and 30 to the end of the vector.
5. Get the size of the vector:
6. Obtain the number of elements in the vector by using the numbers.size() method.
7. Accessing elements in a vector:
8. Access the first element in the vector by using the variable “firstElement”. Access the last element in the vector by using the variable “lastElement”.
9. Iterate through the elements in the vector.
10. Iterate through the elements in the numbers collection using different methods.
11. Inserting and removing elements:
12. Insert an element at a specific position in the vector. // 在向量中的指定位置插入一个元素
    Delete the element at the specified position in the vector. // 删除向量中指定位置的元素
13. Clear the vector.
14. Clear all elements in the vector.

These are just some common uses of the vector container, there are many other functions and methods available for manipulating and managing data in a vector.