add cpp file

lab_yourturn.cpp

@@ -0,0 +1,14 @@
+#include <iostream>
+#include "aiyourturn.h"
+
+int main()
+{
+    AI firstAI;
+    AI secondAI;
+
+    std::cout << std::endl;
+
+    AI::how_many_ais();
+
+    return 0;
+}