quicksort example, I64.parse, IO.write_file

examples/quicksort.zr

@@ -0,0 +1,46 @@
+func quicksort[arr: Array] : I64
+    do_quicksort(arr, 0, Array.size(arr)-1)
+
+func do_quicksort[arr: Array, low: I64, high: I64] : I64
+    if low < high
+        let i: I64 = partition(arr, low, high)
+        do_quicksort(arr, low, i - 1)
+        do_quicksort(arr, i + 1, high)
+
+func partition[arr: Array, low: I64, high: I64] : I64
+    let pivot: I64 = Array.nth(arr, high)
+    let i: I64 = low - 1
+    for j in low:high
+        if Array.nth(arr, j) <= pivot
+            i = i + 1
+            let temp: I64 = Array.nth(arr, i)
+            Array.set(arr, i, Array.nth(arr, j))
+            Array.set(arr, j, temp)
+    let temp: I64 = Array.nth(arr, i + 1)
+    Array.set(arr, i + 1, Array.nth(arr, high))
+    Array.set(arr, high, temp)
+    return i + 1
+
+func main[] : I64
+    let arr: Array = Array.new()
+    Array.push(arr, 340)
+    Array.push(arr, 252)
+    Array.push(arr, 352)
+    Array.push(arr, 117)
+    Array.push(arr, 650)
+    Array.push(arr, 652)
+    Array.push(arr, 322)
+    Array.push(arr, 175)
+    Array.push(arr, 714)
+    Array.push(arr, 268)
+    Array.push(arr, 725)
+    Array.push(arr, 664)
+
+    for i in 0:Array.size(arr)
+        print_i64(Array.nth(arr, i))
+    print("------------")
+
+    quicksort(arr)
+
+    for i in 0:Array.size(arr)
+        print_i64(Array.nth(arr, i))