# C++ Program for BogoSort or Permutation Sort

• Last Updated : 13 Jun, 2022

BogoSort also known as permutation sort, stupid sort, slow sort, shotgun sort or monkey sort is a particularly ineffective algorithm based on generate and test paradigm. The algorithm successively generates permutations of its input until it finds one that is sorted.(Wiki
For example, if bogosort is used to sort a deck of cards, it would consist of checking if the deck were in order, and if it were not, one would throw the deck into the air, pick the cards up at random, and repeat the process until the deck is sorted.
PseudoCode:

```while not Sorted(list) do
shuffle (list)
done```

## CPP

 `// C++ implementation of Bogo Sort` `#include ` `using` `namespace` `std;`   `// To check if array is sorted or not` `bool` `isSorted(``int` `a[], ``int` `n)` `{` `    ``while` `(--n > 0)` `        ``if` `(a[n] < a[n - 1])` `            ``return` `false``;` `    ``return` `true``;` `}`   `// To generate permutation of the array` `void` `shuffle(``int` `a[], ``int` `n)` `{` `    ``for` `(``int` `i = 0; i < n; i++)` `        ``swap(a[i], a[``rand``() % n]);` `}`   `// Sorts array a[0..n-1] using Bogo sort` `void` `bogosort(``int` `a[], ``int` `n)` `{` `    ``// if array is not sorted then shuffle` `    ``// the array again` `    ``while` `(!isSorted(a, n))` `        ``shuffle(a, n);` `}`   `// prints the array` `void` `printArray(``int` `a[], ``int` `n)` `{` `    ``for` `(``int` `i = 0; i < n; i++)` `        ``printf``(``"%d "``, a[i]);` `    ``printf``(``"\n"``);` `}`   `// Driver code` `int` `main()` `{` `    ``int` `a[] = { 3, 2, 5, 1, 0, 4 };` `    ``int` `n = ``sizeof` `a / ``sizeof` `a;` `    ``bogosort(a, n);` `    ``printf``(``"Sorted array :\n"``);` `    ``printArray(a, n);` `    ``return` `0;` `}`

Output:

```Sorted array :
0 1 2 3 4 5```

Time Complexity:

Worst Case: O(∞) (since this algorithm has no upper bound)
Average Case: O(n*n!)
Best Case: O(n)(when the array given is already sorted)

Auxiliary Space: O(1)

Please refer complete article on BogoSort or Permutation Sort for more details!

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