Matching Arguments with Parameters
		• Only a variable can be passed as an argument to a reference parameter because a function can assign a new value to the argument. • In contrast, an arbitrarily complicated expression can be passed to a value parameter. • Consider the following function heading:     void DoThis (float val,    //Value           int& count)   //Reference • Then, the following function calls are valid DoThis(someFloat, someInt) DoThis(9.83, intCounter) DoThis(4.9 * sqrt(y), myInt);