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How to sort a Vector in descending order using STL in C++?
  • Difficulty Level : Basic
  • Last Updated : 19 Mar, 2019

Given a vector, sort this vector in descending order using STL in C++.

Example:

Input: vec = {1, 45, 54, 71, 76, 12}
Output: {76, 71, 54, 45, 12, 1}

Input: vec = {1, 7, 5, 4, 6, 12}
Output: {12, 7, 6, 5, 4, 1}

Approach: Sorting can be done with the help of sort() function provided in STL.

Syntax:

sort(arr, arr + n, greater<T>());




// C++ program to sort Vector
// in descending order
// using sort() in STL
  
#include <bits/stdc++.h>
using namespace std;
  
int main()
{
    // Get the vector
    vector<int> a = { 1, 45, 54, 71, 76, 12 };
  
    // Print the vector
    cout << "Vector: ";
    for (int i = 0; i < a.size(); i++)
        cout << a[i] << " ";
    cout << endl;
  
    // Sort the vector in descending order
    sort(a.begin(), a.end(), greater<int>());
  
    // Print the reversed vector
    cout << "Sorted Vector in descendiing order:n";
    for (int i = 0; i < a.size(); i++)
        cout << a[i] << " ";
    cout << endl;
  
    return 0;
}
Output:
Vector: 1 45 54 71 76 12 
Sorted Vector in descendiing order: 
76 71 54 45 12 1
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