// 'Hello World!' program #include  #include  using namespace std; //declare global variable const bool DEBUG = true; string displayMessage(string message){ if (DEBUG) { cout 

Variable Scope-local variables You maybe have noticed the re-use of variable names in the different functions. You can add some debugging statements to the previous code to see that *local* variables have scope only in the functions. Printing out the values of message in each function, you can see that changing message in display Message() will not change // 'Hello World!' program #include #include using namespace std; / / declare global variable const bool DEBUG = true; string displayMessage (string message) { if (DEBUG) { cout #include using namespace std; / / declare global variable const bool DEBUG = true; string displayMessage (string message) { if (DEBUG) { cout