Detecting an Exception
	• Therefore, try blocks establish when exception handling is in effect. • If an exception is thrown outside of a try block, terminate is called. • When we are in a try block, we are able to select and handle different types of exceptions. This is called catching an exception. • The following demonstrates a try block that "turns on" exception handling for our entire program: int main() {   try {     ...          //program code   }   ...            //code to handle exceptions   cout <<"normal program exit" <<endl;   return(0); }