class QuickSort {
fun quickSort(arr: IntArray, low: Int, high: Int) {
if (low < high) {
val pIndex = partition(arr, low, high)
quickSort(arr, low, pIndex - 1)
quickSort(arr, pIndex + 1, high)
}
}
private fun partition(arr: IntArray, low: Int, high: Int): Int {
val pivot = arr[high]
var i = low - 1
for (j in low until high) {
if (arr[j] <= pivot) {
i++
// swap arr[i] and arr[j]
val temp = arr[i]
arr[i] = arr[j]
arr[j] = temp
}
}
val temp = arr[i + 1]
arr[i + 1] = arr[high]
arr[high] = temp
return i + 1
}
fun printArray(arr: IntArray) {
for (value in arr) print("$value ")
println()
}
}
fun main() {
val numbers = intArrayOf(99, 44, 6, 2, 1, 5, 63, 87, 283, 4, 0)
val quickSort = QuickSort()
quickSort.quickSort(numbers, 0, numbers.size - 1)
quickSort.printArray(numbers)
}
