object1:
.word print # entry point for print
.word cancel # entry point for cancel
.asciiz "Hello World" # string data
The
cancel() method must affect
only the data of the object it is called with.
Here is a hypothetical program written in an object oriented language:
main()
{
MyClass object1("Hello World");
MyClass object2("Silly Example");
object1.print();
object1.cancel();
object1.print();
object2.print();
}
The first activation of
print()
works with the data of
object1.
Then,
the activation of
cancel()
causes it to alter just the data of that object.
The second activation of
print()
causes it to print the altered data of
object1.
The data of object2
has not been affected by all this:
Hello World xxxxxxxxxxx Silly Example
(Review: ) How does a method access the data of an object?