Add 选择排序

选择排序

@@ -0,0 +1,20 @@
+void SelectionSort(int arr[], int length)
+{
+    int index, temp;
+ 
+	for (int i = 0; i < length; i++)
+	{
+        index = i;
+		for (int j = i + 1; j < length; j++)
+		{
+			if (arr[j] < arr[index])
+				index = j;
+		}
+		if (index != i)
+		{
+			temp = arr[i];
+			arr[i] = arr[index];
+			arr[index] = temp;
+		}
+	}
+}