slice a vector c++

To slice a vector in C++, you can use the std::vector member function std::vector::erase. The erase function removes elements from a vector based on a specified range.

Here are the steps to slice a vector in C++:

  1. Determine the starting and ending positions of the slice. These positions are usually represented by iterators. An iterator is a pointer-like object that points to an element within a container. In this case, we'll use two iterators to represent the range of elements to be removed.

  2. Create an iterator pointing to the starting position of the slice. You can use the std::vector::begin() function to obtain an iterator pointing to the first element of the vector.

  3. Create an iterator pointing to the ending position of the slice. You can use the std::vector::begin() function to obtain an iterator pointing to the element just after the last element of the slice.

  4. Pass the iterators representing the range to the std::vector::erase function. This function removes the elements within the specified range from the vector.

  5. The erase function returns an iterator pointing to the element immediately following the last removed element. You can use this iterator to access the remaining elements of the vector after the slice has been removed.

Here is an example of slicing a vector in C++:

#include <iostream>
#include <vector>

int main() {
    std::vector<int> numbers = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};

    // Slice the vector from index 2 to index 6
    auto start = numbers.begin() + 2;
    auto end = numbers.begin() + 7;
    numbers.erase(start, end);

    // Print the remaining elements of the vector
    for (const auto& number : numbers) {
        std::cout << number << " ";
    }

    return 0;
}

In this example, the numbers vector is sliced from index 2 to index 6. The elements within this range (3, 4, 5, 6, 7) are removed using the erase function. The remaining elements of the vector (1, 2, 8, 9, 10) are then printed.