What does an event handler do?
a. organize the files in a directory.
b. encourage the user to create click events.
c. create shortcut names to use as handles for often-used files.
d. wait for an event and then do something in response to it.

*write a program that defines symbolic names for several string literals (chars between quotes). * use each symbolic name in a variable definition. * use of symbolic to compose the assembly code instruction set can perform vara = (vara - varb) + (varc - vard); ensure that variable is in unsigned integer data type. * you should also further enhance your symbolic logic block to to perform expression by introducing addition substitution rule. vara = (vara+varb) - (varc+vard).