PROGRAM FOR INDEXED SEQUENTIAL FILE CREATION (RANDOM MODE):

We have to write a program to create an Indexed Sequential File in random mode for Student particulars. Suppose just 2 fields: rno(Roll Number), name(Name  of Student) 

identification division.

  program- id.

  environment division.

  input-output section.

  file-control.

    select stu- file assign to disk

    organization is indexed

    access mode is random

    record key is rno

    file status is fs.

  data division.

  file section.

  fd stu- file

    label records are standard

    value of file- id is "stu.dat".

  01 stu-rec.

    02 rno pic 9(3).

    02 name pic x(20).

  working-storage section.

  01 fs pic x(2) value spaces.

  01 ans pic x value space.    

procedure division.  

p-1.

  open i-o stu-file.

  if fs = "30"

    open output stu-file

    close stu-file

    open i-o stu-file.

  perform g-w-para until ans = "n".

  close stu-file.

  stop run.

g-w-para.

display(1 1) erase.

display(3 5) "Rno : ".

accept rno.

display(5 5) "Name : ".

accept name.

write stu-rec invalid key display(15 5) "Error!".

display(20 5) "Continue [y/n] : ".