| Input vs
Output |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| v | Many
programming languages (including VB6) |
|||||||||||||
| provide
several different ways of passing values back |
||||||||||||||
| and
forth between the actual and the formal |
||||||||||||||
| parameters. |
||||||||||||||
| v | The
default in Visual Basic, and the only kind we’ll |
|||||||||||||
| use
in CSE/IMT 100, is pass by reference. |
||||||||||||||
| v | Pass
by reference allows information to flow in both |
|||||||||||||
| directions. |
||||||||||||||
| o | Formal
parameters can be used as inputs or outputs or both |
|||||||||||||
| o | Any
changes made to a formal parameter will make a |
|||||||||||||
| change
to the corresponding actual parameter. |
||||||||||||||