Display, modify, and display the parameters

When the main function calls aFunction, control is transferred to aFunction.

The code in aFunction:

• Displays a message indicating that it has been called
• Displays the parameters.
• Modifies the values of the parameters.
• Displays the parameters again.
• Terminates and returns control to the main function.

(Note that a return statement is not required when the specified return type is void.)