How to Sort an Array in C++


How to Sort an Array in C++ ?

Answer

To sort an array in C++, you can use the std::sort() function from the algorithm library.



✐ Examples

1 Sort Integer Array in Ascending Order

In this example,

  1. We include the necessary header files for input-output and sorting algorithms.
  2. We create a vector numbers with values 5, 2, 8, 1, 6.
  3. We use the std::sort() function from the algorithm library to sort the vector in ascending order.
  4. Finally, we print the sorted vector numbers to the console.

C++ Program

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

int main() {
    std::vector<int> numbers = {5, 2, 8, 1, 6};
    std::sort(numbers.begin(), numbers.end());
    std::cout << "Sorted array in ascending order: ";
    for (int num : numbers) {
        std::cout << num << " ";
    }
    return 0;
}

Output

Sorted array in ascending order: 1 2 5 6 8

2 Sort Integer Array in Descending Order

In this example,

  1. We include the necessary header files for input-output and sorting algorithms.
  2. We create a vector numbers with values 5, 2, 8, 1, 6.
  3. We define a custom comparator function compare that sorts in descending order.
  4. We use the std::sort() function with our custom comparator to sort the vector in descending order.
  5. Finally, we print the sorted vector numbers to the console.

C++ Program

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

bool compare(int a, int b) {
    return a > b;
}

int main() {
    std::vector<int> numbers = {5, 2, 8, 1, 6};
    std::sort(numbers.begin(), numbers.end(), compare);
    std::cout << "Sorted array in descending order: ";
    for (int num : numbers) {
        std::cout << num << " ";
    }
    return 0;
}

Output

Sorted array in descending order: 8 6 5 2 1

Summary

In this tutorial, we learned How to Sort an Array in C++ language with well detailed examples.




More C++ Arrays Tutorials

  1. How to Declare an Array in C++ ?
  2. How to Initialize an Array in C++ ?
  3. How to Access Array Elements in C++ ?
  4. How to Access Array Elements using Index in C++ ?
  5. How to get First Element in Array in C++ ?
  6. How to get Last Element in Array in C++ ?
  7. How to check if an Array is Empty in C++ ?
  8. How to check if an Array is Not Empty in C++ ?
  9. How to get Sub Array in C++ ?
  10. How to Get Array Length in C++ ?
  11. How to Iterate Over an Array in C++ ?
  12. How to Iterate Over an Array in Reverse Order in C++ ?
  13. How to get the Index of Specified Element in an Array in C++ ?
  14. How to check if Specified Element is present in the Array in C++ ?
  15. How to count the Number of Occurrences of Specified Element in the Array in C++ ?
  16. How to Sort an Array in C++ ?
  17. How to Sort an Array in Ascending Order in C++ ?
  18. How to Sort an Array in Descending Order in C++ ?
  19. How to create a Two Dimensional Array in C++ ?
  20. How to Iterate over a Two Dimensional Array in C++ ?
  21. How to create a Three Dimensional Array in C++ ?
  22. How to Copy an Array in C++ ?
  23. How to Split an Array in C++ ?
  24. How to Join Arrays in C++ ?
  25. How to check if Two Arrays are Equal in C++ ?
  26. How to check if Two Arrays have Same Elements (Regardless of Order) in C++ ?
  27. How to Convert an Array of Integers to an Array of Strings in C++ ?
  28. How to Convert an Array of Strings to an Array of Integers in C++ ?
  29. How to Reverse an Array in C++ ?
  30. How to Shuffle an Array in C++ ?
  31. How to Rotate Elements in an Array in C++ ?
  32. How to Filter Elements of an Array based on a Condition in C++ ?
  33. How to Declare an Integer Array in C++ ?
  34. How to Declare a Float Array in C++ ?
  35. How to Declare a String Array in C++ ?
  36. How to Remove Duplicates in an Array in C++ ?
  37. How to Remove Specific Element from an Array in C++ ?
  38. How to Remove Element from Array based on a Condition in C++ ?
  39. How to Sort a String Array in Dictionary Order in C++ ?
  40. How to Concatenate Strings in Array in C++ ?