Drawing class diagram

log into university account Registration System

[validation ok]

update registered course

Actor

login() request to register for a class

Validate choose course

choose course time

[choose Available]

[available seat in course]

Catalog Database

check course availability

check time and if class is full

User

Student

Professor

Registrar

Biling system

Billing system

Login

View Report Card

Register For Courses

Select courses to teach

Submit grades

Maintain professor information

Maintain student information

Close registration