QuickSort.swift

//Using C function in Swift
var numbers = [50,4,13,2,1]

func quickSort(input: inout [Int]) {
    qsort(&input, input.count, MemoryLayout<Int>.size) { (l,r) -> Int32 in
        if let left = l?.assumingMemoryBound(to: Int.self),
            let right = r?.assumingMemoryBound(to: Int.self) {
            if left.pointee < right.pointee {
                return -1
            }else if left.pointee == right.pointee {
                return 0
            }else {
                return 1
            }
        }
        return 0
    }
}

print(numbers)