c++ remove last element from vector

To remove the last element from a vector in C++, you can use the pop_back() function. This function removes the last element from the vector and reduces the size of the vector by one.

Here are the steps to remove the last element from a vector:

1. Declare a vector variable and initialize it with some elements:

std::vector<int> myVector = {1, 2, 3, 4, 5};

1. Use the pop_back() function to remove the last element from the vector:

myVector.pop_back();

After executing the pop_back() function, the last element (5) will be removed from the vector.

Example:

Here's a complete example that demonstrates the removal of the last element from a vector:

#include <iostream>
#include <vector>

int main() {
    std::vector<int> myVector = {1, 2, 3, 4, 5};

    // Display the vector before removing the last element
    std::cout << "Before removing the last element: ";
    for (const auto& element : myVector) {
        std::cout << element << " ";
    }
    std::cout << std::endl;

    // Remove the last element from the vector
    myVector.pop_back();

    // Display the vector after removing the last element
    std::cout << "After removing the last element: ";
    for (const auto& element : myVector) {
        std::cout << element << " ";
    }
    std::cout << std::endl;

    return 0;
}

Output:

Before removing the last element: 1 2 3 4 5 
After removing the last element: 1 2 3 4 

In this example, the vector myVector initially contains the elements 1, 2, 3, 4, and 5. The pop_back() function is then used to remove the last element (5) from the vector. Finally, the contents of the vector are displayed before and after the removal of the last element.