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This article mainly explains "what are the common uses of vector in C++". The content in the article is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn "what are the common uses of vector in C++".

1. Vector in C++

Vector has two parameters, one is size, which represents the number of elements stored in the current vector container, and the other is capacity, which indicates the number of elements that the current vector applies for in memory.

Capacity will change dynamically as you use vector built-in functions.

Capacity is usually larger than size, so if you push_back data into vector, you don't have to reapply memory and copy elements to new memory areas, which saves time.

Vector can be assigned to each other or as the return value of a function

2. Initialize

Same as the initialization of an array

Vector a = {11pm 2pm 3}; 3. Common functions

# include # include using namespace std; int main () {vector vec;}

The use of multidimensional vector is the same as multidimensional string.

Add an element at the end: push_back (the element to be added)

Vec.push_back (3)

Description: add the number 3 to the end of vec.

Note: for variables of type vector to add elements, you can only use the push_back () function

For (int I = 0 position I)

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