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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
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] : ".
RELATIVE FILES: The Files that are stored on a direct access storage medium like magnetic disk are frequently known as direct access files. The COBOL supports three different
Minus sign - edit characters for numeric data: The minus sign can appear either at the leftmost or rightmost location of the picture. If an item is negative, a minus sign will
PROGRAM FOR CONDITION NAMES: We have to write a simple program to demonstrate Condition names usage. identification division. program- id. environment division.
Comparing features of oracle rdbms with Mysql
FILE CHARACTERISTICS: The task of file handling is the responsibility of the system software termed as IOCS (Input-Output control system). Record Size: We know that th
we have input file ,record layout is EMP ID (6 char) , EMP NAME (20 char), Designation (3 char),Salary (5 digit) Base Branch (10char) Grade (3 Alphanumeric). This is the input file
PROGRAM FOR PERFORM ...UNTIL We have to write a program to find the sum of "n" natural numbers. Identification division. Program- id. PerfUntil. Environment division.
Evaluate is like a case statement & Evaluate stamenet can be used to replace nested Ifs. The difference b/w EVALUATE and case is that there is no 'break' is required for EVALUATE
File Description for the Relative and Indexed Files: The FD entry for a relative or an indexed file is similar to that of a sequential file. Some compilers do not permit varia
B (Blank Insertion) : The occurrence of a B anyplace in the picture will insert a space character in the edited data. There can be more than one B in the picture. Examples:
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