The "test-pqueue" command:

This command is used for testing the PQueue object. There are one or more arguments, each of the form:

(1)

NUMBER/TEXT

(2)

^

(3)

-v

Form (1) arguments add an entry to the queue with value NUMBER and content TEXT. Form (2) pops off the queue entry with the smallest value. Form (3) (the -v option) causes the heap to be displayed after each subsequent operation.