How to Sort Items of a Set in C++ - Step by Step Examples

How to Sort Items of a Set in C++ ?

Answer

To sort items of a Set in C++, you can copy the Set elements to a vector and use the std::sort algorithm.


✐ Examples

1 Sort Items of a Set of Integers

In this example,

  1. We create a set named numberSet containing integer values.
  2. We create a vector named numbers and copy the elements of numberSet into it.
  3. We sort the vector using the std::sort algorithm from the <algorithm> header.
  4. Finally, we print the sorted vector to the standard output.

C++ Program

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

int main() {
    std::set<int> numberSet = {5, 3, 8, 1, 2};
    std::vector<int> numbers(numberSet.begin(), numberSet.end());
    std::sort(numbers.begin(), numbers.end());
    for (const auto& num : numbers) {
        std::cout << num << " ";
    }
    return 0;
}

Output

1 2 3 5 8

2 Sort Items of a Set of Strings

In this example,

  1. We create a set named stringSet containing string values.
  2. We create a vector named strings and copy the elements of stringSet into it.
  3. We sort the vector using the std::sort algorithm from the <algorithm> header.
  4. Finally, we print the sorted vector to the standard output.

C++ Program

#include <iostream>
#include <set>
#include <vector>
#include <algorithm>
#include <string>

int main() {
    std::set<std::string> stringSet = {"banana", "apple", "cherry", "date"};
    std::vector<std::string> strings(stringSet.begin(), stringSet.end());
    std::sort(strings.begin(), strings.end());
    for (const auto& str : strings) {
        std::cout << str << " ";
    }
    return 0;
}

Output

apple banana cherry date

Summary

In this tutorial, we learned How to Sort Items of a Set in C++ language with well detailed examples.


More C++ Sets Tutorials

  1. How to create an Empty Set in C++ ?
  2. How to Initialize a Set in C++ ?
  3. How to Get Length of a Set in C++ ?
  4. How to create a Set of size N in C++ ?
  5. How to create a Set of Numbers from 1 to N in C++ ?
  6. How to create a Set of integers in C++ ?
  7. How to create a Set of Strings in C++ ?
  8. How to Access Items in a Set in C++ ?
  9. How to get a Random Item in a Set in C++ ?
  10. How to Iterate Over a Set in C++ ?
  11. How to check if a Set is Empty in C++ ?
  12. How to check if a Set is Not Empty in C++ ?
  13. How to get Subset from a Set in C++ ?
  14. How to check if a Specific Item is present in the Set in C++ ?
  15. How to check if a Set contains all the items of Another Set in C++ ?
  16. How to Sort Items of a Set in C++ ?
  17. How to Copy a Set in C++ ?
  18. How to add an Item to a Set in C++ ?
  19. How to find Union of Two Sets in C++ ?
  20. How to find Intersection of Two Sets in C++ ?
  21. How to check if Two Sets are Equal in C++ ?
  22. How to Convert a Set of Integers to a Set of Strings in C++ ?
  23. How to Convert a Set of Strings to a Set of Integers in C++ ?
  24. How to Convert a Set of Floats to a Set of Strings in C++ ?
  25. How to Filter Items of a Set based on a Condition in C++ ?
  26. How to Remove Specific Item from a Set in C++ ?
  27. How to Remove Items from Set based on a Condition in C++ ?
  28. How to create a Set of Sets in C++ ?