Initial data commit

Task/Sorting-algorithms-Cocktail-sort/Vala/sorting-algorithms-cocktail-sort.vala

@@ -0,0 +1,33 @@
+void swap(int[] array, int i1, int i2) {
+  if (array[i1] == array[i2])
+    return;
+  var tmp = array[i1];
+  array[i1] = array[i2];
+  array[i2] = tmp;
+}
+
+void cocktail_sort(int[] array) {
+  while(true) {
+    bool flag = false;
+    int[] start = {1, array.length - 1};
+    int[] end = {array.length, 0};
+    int[] inc = {1, -1};
+    for (int it = 0; it < 2; ++it) {
+      flag = true;
+      for (int i = start[it]; i != end[it]; i += inc[it])
+	if (array[i - 1] > array[i]) {
+	  swap(array, i - 1, i);
+          flag = false;
+	}
+    }
+    if (flag) return;
+  }
+}
+
+void main() {
+  int[] array = {5, -1, 101, -4, 0, 1, 8, 6, 2, 3};
+  cocktail_sort(array);
+  foreach (int i in array) {
+    stdout.printf("%d ", i);
+  }
+}