access last element in vector in c++

To access the last element in a vector in C++, you can use the back() function. Here are the steps to access the last element in a vector:

1. Declare a vector variable: Start by declaring a vector variable of the desired type. For example, std::vector<int> myVector; declares an empty vector of integers.

2. Add elements to the vector: Use the push_back() function to add elements to the vector. For example, myVector.push_back(10); adds the element 10 to the end of the vector.

3. Access the last element: To access the last element in the vector, use the back() function. For example, int lastElement = myVector.back(); assigns the value of the last element in the vector to the variable lastElement.

Here is an example that demonstrates accessing the last element in a vector:

#include <iostream>
#include <vector>

int main() {
    std::vector<int> myVector;
    myVector.push_back(10);
    myVector.push_back(20);
    myVector.push_back(30);

    int lastElement = myVector.back();
    std::cout << "Last element: " << lastElement << std::endl;

    return 0;
}

In this example, the vector myVector is declared and three elements (10, 20, and 30) are added using the push_back() function. The last element of the vector, 30, is then accessed using the back() function and assigned to the variable lastElement. Finally, the value of lastElement is printed to the console.

I hope this helps! Let me know if you have any further questions.