Well, I have to edit a program which we previously used for reading a header file to be able to read a trailer from a .dat file. The .dat file consists of 5 entries in each record and I am assuming atleast 5 records(which I believe the amount of records should be taken from the trailer). Also I believe he said the SENTINEL value must be -1.

Our instructor gave us an extremely limited amount of information on how to attempt to do this...