stl for sorting IN C++

To sort elements in C++ using the Standard Template Library (STL), you can use the sort() function. Here are the steps to perform sorting using the STL:

1. Include the necessary header file: #include <algorithm>. This header file contains the implementation of the sort() function.

2. Create a container to hold the elements you want to sort. This can be an array, vector, or any other container supported by the STL.

3. Call the sort() function and pass the container as the first and second arguments. The third and fourth arguments are optional and can be used to specify a range within the container to sort.

4. The sort() function uses the default comparison operator (operator<) to determine the order of elements. If you want to sort in descending order, you can pass a custom comparison function as the third argument.

5. After the sort() function is called, the elements in the container will be rearranged in ascending or descending order, depending on the comparison operator used.

Here is an example of sorting a vector of integers using the STL:

#include <algorithm>
#include <vector>

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

    std::sort(numbers.begin(), numbers.end());

    // After sorting, the vector will be: {1, 2, 4, 5, 7}

    return 0;
}

In this example, we include the necessary header files, create a vector called numbers, and then call the sort() function to sort the elements in ascending order. The resulting vector will be {1, 2, 4, 5, 7}.