Cannot find symbol in same package and directory

Change directories to the parent directory of assignment02. You should then be able to use

javac assignment02\Course.java assignment02\Offering.java

or

javac assignment02\Course.java 
javac assignment02\Offering.java

or even

javac assignment02\*.java

The compiler is is looking for the Course class in the assignment02 package FROM your current directory (so when you're in the assignment02 directory, it's effectively trying to look in assignment02/assignment02, which obviously isn't right).

While this will correct your current problem you will then get the following error:

assignment02\Offering.java:15: cannot find symbol
symbol  : variable getNumCredits
location: class assignment02.Course
    return course.getNumCredits;
                 ^
1 error

Which will need to corrected.