Add new cpp/algorithms directory, include basic selection sort example

cpp/algorithms/sorting/selection/lib-select.h

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+/*#############################################################################
+## Author: Shaun Reed                                                        ##
+## Legal: All Content (c) 2020 Shaun Reed, all rights reserved               ##
+## About: An example implementation of selection sort using a custom library ##
+##                                                                           ##
+## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com | GitHub: shaunrd0  ##
+###############################################################################
+*/
+
+#ifndef LIB_SELECT_H
+#define LIB_SELECT_H
+
+#define ARRAY_LENGTH 10
+
+/** RandomArray
+ * Returns an array automatically filled with random values
+ *  Sizes array to match length setting ARRAY_LENGTH
+ * @return A pointer to a static array
+ */
+int * RandomArray();
+
+/** SelectionSort
+ * Sorts an array of integers in ascending order
+ * @param arr The array to sort
+ */
+void SelectionSort(int arr[]);
+
+/** PrintArray
+ * Prints an array based on the define ARRAY_LENGTH
+ * @param arr The array to print
+ */
+void PrintArray(int arr[]);
+
+#endif // LIB_SELECT_H