sort in descending order c++ stl

To sort elements in descending order using the C++ STL, you can follow these steps:

1. Include the necessary header file: cpp #include <algorithm>

2. Create a container with the elements you want to sort. For this example, let's assume we have a vector of integers named myVector: cpp std::vector<int> myVector;

3. Populate the container with the elements you want to sort. You can add elements to the vector using the push_back() function: cpp myVector.push_back(5); myVector.push_back(2); myVector.push_back(8); myVector.push_back(1);

4. Use the sort() function from the <algorithm> header to sort the elements in descending order. Pass the beginning and end iterators of the container, along with a lambda function as the third argument to specify the sorting order: cpp std::sort(myVector.begin(), myVector.end(), [](int a, int b){ return a > b; });

In this example, the lambda function [](int a, int b){ return a > b; } is used to define the sorting order. It compares two integers a and b and returns true if a is greater than b, indicating that a should come before b in the sorted sequence.

1. After executing the sort() function, the elements in myVector will be sorted in descending order.

Here's the complete code:

#include <algorithm>
#include <vector>

int main() {
    std::vector<int> myVector;
    myVector.push_back(5);
    myVector.push_back(2);
    myVector.push_back(8);
    myVector.push_back(1);

    std::sort(myVector.begin(), myVector.end(), [](int a, int b){ return a > b; });

    // Print the sorted vector
    for (int num : myVector) {
        std::cout << num << " ";
    }

    return 0;
}

When you run this code, it will output: 8 5 2 1, which is the sorted vector in descending order.