C++ Vector Operation Add Element
To add an element to a C++ vector, you can follow these steps:
Declare a vector variable: Start by declaring a vector variable of the desired type. For example, if you want to create a vector of integers, you can declare it like this:
cpp std::vector<int> myVector;
Add elements using
push_back()
: To add elements to the vector, you can use thepush_back()
function. This function appends a new element to the end of the vector. For example, to add the value 5 to the vector, you can use the following code:cpp myVector.push_back(5);
Repeat step 2 as needed: You can repeat step 2 to add more elements to the vector. For example, to add the values 10, 15, and 20 to the vector, you can use:
cpp myVector.push_back(10); myVector.push_back(15); myVector.push_back(20);
Access and use the elements: After adding elements to the vector, you can access and use them as needed. You can access individual elements using the subscript operator
[]
. For example, to access the first element of the vector, you can use:cpp int firstElement = myVector[0];
Note: Remember that the index of the first element is 0, not 1.
You can also use loops to iterate over the elements of the vector. For example, you can use a for
loop to print all the elements of the vector:
cpp
for (int i = 0; i < myVector.size(); i++) {
std::cout << myVector[i] << " ";
}
This will output: 5 10 15 20
.
By following these steps, you can add elements to a C++ vector and perform operations on them as needed.