how to sort a vector in reverse c++

To sort a vector in reverse order in C++, you can use the sort() function from the <algorithm> library along with the greater comparator. Here are the steps to do it:

1. Include the necessary libraries:

#include <algorithm>
#include <vector>

1. Create a vector and populate it with elements:

std::vector<int> myVector = {5, 2, 8, 1, 10};

1. Sort the vector in reverse order using the sort() function with the greater comparator:

std::sort(myVector.begin(), myVector.end(), std::greater<int>());

• The std::sort() function takes three arguments: the beginning iterator of the vector (myVector.begin()), the ending iterator of the vector (myVector.end()), and the comparator function (std::greater<int>()).

• The std::greater<int>() is a predefined comparator function that compares two elements in reverse order.

• After sorting, the vector myVector will be in reverse order:

// Output: 10 8 5 2 1

Here's the complete code snippet:

#include <algorithm>
#include <vector>

int main() {
  std::vector<int> myVector = {5, 2, 8, 1, 10};
  std::sort(myVector.begin(), myVector.end(), std::greater<int>());

  // Print the sorted vector
  for (const auto& element : myVector) {
    std::cout << element << " ";
  }

  return 0;
}

This code will output: 10 8 5 2 1, which is the sorted vector in reverse order.