Can we display index in COBOL?
Yes, we can. Simply set some ws variable to the index and display that. Index variable is S9(8) comp, takes up one word, it means the physical address in the main storage.
How does Index work in COBOL?
An index is a displacement of element from the start of the table. An index is declared with Occurs clause using INDEXED BY clause. The value of index can be changed using SET statement and PERFORM Varying option.
What is index and subscript in COBOL?
Subscript is no of occurrences of an array. Index is no of displacement positions of an array. Subscript can increase by using ADD statement and decrease by using SUBTRACT statement. Index can increase by using SET UP BY statement and decrease by using SET DOWN BY statement.
Can we display index?
You can’t DISPLAY an index directly. You can SET a numeric field to an index, and then DISPLAY the numeric field.
Can we initialize array in COBOL?
Initializing an Array in the DATA Division The VALUE clause is used to initialize a data-item in WORKING-STORAGE, but COBOL-74 does not permit its use in a definition containing an OCCURS clause. A data-item with a VALUE clause must be defined and the space it occupies, and then REDEFINED as an array: 01 MONTH-NAMES.
Why index is faster than subscript in COBOL?
Using indexes to address a table is more efficient than using subscripts since the index already contains the displacement from the start of the table and does not have to be calculated at run time. This will allow full word arithmetic to be used during the calculations. …
How do you create an index data item?
You can use the USAGE IS INDEX clause to create an index data item, and can use an index data item with any table. For example, INX-B in the following code is an index data item: 77 INX-B USAGE IS INDEX. . . . SET INX-A TO 10 SET INX-B TO INX-A.
What is binary search in Cobol?
Binary search is a way of searching for element [array] within group of elements. Binary search works by comparing an input value to the middle element of the array. If the search element is greater than middle element then array is divided into 2 equal parts and search will happen in second half.
How big is a pointer variable in COBOL?
POINTER is a four-byte data item that holds the address of another data item. PROCEDURE-POINTER is a four- or eight-byte data item (depending on the operating system) that contains the address of a program-entry point. Rules of COBOL Pointer Variable A POINTER data item cannot have a PICTURE clause.
When to use the SET command in COBOL?
In order to assign the value TRUE, the PTF for Language Environment® APAR PK30521 must be installed on z/OS Version 1 Release 6, Version 1 Release 7, and Version 1 Release 8. For Enterprise COBOL for z/OS Version 5, you cannot use the SET command to set an index with a non-integer data item (e.g. PIC 9v9 ).
What is the COBOL address of the sender?
In addition, COBOL ADDRESS OF as a receiver must be level 1 or 77, and COBOL ADDRESS OF as a sender can be any level except 66 or 88. z/OS Debugger provides a hexadecimal constant that can be used with the SET command, where the hexadecimal value is preceded by an “H” and delimited by quotation marks (“) or apostrophes (‘).
How to set address of Tiot to ptr in COBOL?
000240 MOVE W (1) TO FULL-WORD. 000260 SET ADDRESS OF W-01 TO PTR. 000270 MOVE W (1) TO FULL-WORD. 000290 SET ADDRESS OF W-01 TO PTR. 000300 MOVE W (2) TO FULL-WORD. 000320 SET ADDRESS OF W-01 TO PTR. 000330 MOVE W (4) TO FULL-WORD. 000350 SET ADDRESS OF TIOT TO PTR.
