How to Sort a Vector in Descending Order in C++ - Step by Step Examples

How to Sort a Vector in Descending Order in C++ ?

Answer

To sort a vector in descending order in C++, you can use the sort function from the <algorithm> header with a custom comparison function.

✐ Examples

1 Sort a Numeric Vector in Descending Order

In this example,

We include the necessary headers: <iostream> and <vector>.
We create a vector named vec containing several numeric values.
We call the sort function, passing a custom comparison function that sorts elements in descending order. This function sorts the elements of the vector in descending order.
Finally, we print the sorted vector to standard output using a range-based for loop.

C++ Program

#include <iostream>
#include <vector>
#include <algorithm>

int main() {
    // Step 1: Create a vector
    std::vector<int> vec = {5, 2, 8, 3, 9, 1};
    
    // Step 2: Sort the vector in descending order
    std::sort(vec.begin(), vec.end(), std::greater<int>());
    
    // Step 3: Print the sorted vector
    std::cout << "Sorted vector: ";
    for (int num : vec) {
        std::cout << num << " ";
    }
    std::cout << std::endl;
    
    return 0;
}

Output

Sorted vector: 9 8 5 3 2 1

2 Sort a String Vector in Descending Order

In this example,

We include the necessary headers: <iostream> and <vector>.
We create a vector named vec containing several string values.
We call the sort function, passing a custom comparison function that sorts elements in descending order based on lexicographic order. This function sorts the elements of the vector in descending order.
Finally, we print the sorted vector to standard output using a range-based for loop.

C++ Program

#include <iostream>
#include <vector>
#include <algorithm>

int main() {
    // Step 1: Create a vector
    std::vector<std::string> vec = {"apple", "banana", "orange", "grape", "kiwi"};
    
    // Step 2: Sort the vector in descending order
    std::sort(vec.begin(), vec.end(), std::greater<std::string>());
    
    // Step 3: Print the sorted vector
    std::cout << "Sorted vector: ";
    for (const std::string& str : vec) {
        std::cout << str << " ";
    }
    std::cout << std::endl;
    
    return 0;
}

Output

Sorted vector: orange kiwi grape banana apple

Summary

In this tutorial, we learned How to Sort a Vector in Descending Order in C++ language with well detailed examples.

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How to Sort a Vector in Descending Order in C++ - Step by Step Examples

How to Sort a Vector in Descending Order in C++ ?

Answer

✐ Examples

1 Sort a Numeric Vector in Descending Order

C++ Program

Output

2 Sort a String Vector in Descending Order

C++ Program

Output

Summary

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