Is Comp-3 packed decimal?
Usage clause is applicable only on numerical data items. It stores the data in packed decimal form.
How many bytes does Comp-3 occupy?
COMP-3, being Binary Coded Decimal, takes 1/2 byte per digit. So take the picture size, divide by two, and round up.
How do you unpack a comp-3 field in COBOL?
RE: Unpacking comp-3, generically
You can use referance modification to move the packed decimal field into the right-most bytes of a zero-initialied packed decimal working-storage field PIC S9(18). Then unpack that field into a PIC 9(18)- display field.
How do you declare a packed decimal in COBOL?
For example, on the mainframe the value 12,345 would be five (5) bytes in length (i.e. x’F1F2F3F4F5′). If the same information is stored in a packed-decimal (i.e. USAGE IS COMPUTATIONAL-3 or abbreviated as COMP-3) the field would be three (3) bytes in length (i.e. x’12345C’).
…
Introduction.
| Digit | Digit |
|---|---|
| 1 | 2 |
| 0001 | 0010 |
| 1 | 2 |
How is Comp 3 calculated?
To calculate the byte-length of a comp-3 field, start with the total number of digits and divide by 2 giving a result (discarding the remainder if any), then add 1 to the result. So, a field with “pic s9(6) comp-3” would take 4 bytes (6/2 +1).
What is the difference between Comp 1 Comp 2 and Comp 3?
COMP-2 is more precision than COMP-1. Interview Question : Why COMP-1, COMP-2 don t have PIC clause? PIC creates relation between data name and data type. Whereas here data is numeric and length is predefined as one word floating for COMP-1 and double word floating for COMP-3.
How many bytes does S9 7 V99 Comp-3 packed decimal occupy?
S9(7) COMP-3 will take 4 bytes of storage This is the preferred way as it is clear to anyone what was intended.
What is the difference between Comp-1 Comp-2 and Comp-3?
Can we display Comp-3 variables?
1. In case the COMP-3 Data, that you want to see is the data in a Mainframe File, and you would like to see the contents on TSO/ISPF, you can turn the HEX ON on the Command Line. In the below file, the last 2 Bytes are COMP-3 Data. You read the Hexa-decimal value in a top-down fashion.
Can we redefine Comp-3 Variable?
Hello Srikar, There is no way to use only redefines and get what you want. . . To get what you want, create a 9(13) field in ws and move EMP-NBR-1 to it. Redefine the 9(13) field with 2 other fields – the first 9(10) and the second 9(3).
What is the difference between zoned decimal and packed decimal?
Zone decimal uses an entire byte for each digit. This means you can just print a number as if it was text (each ‘character’ stores a digit 0-9) but since there are only 10 digits and a byte can hold 256 different values this is a bit wasteful. Packed decimal uses the fact that 4bits can store 16different values.
What is the difference between decimal and packed decimal?
specifies a method of encoding decimal numbers by using each byte to represent two decimal digits. Packed decimal representation stores decimal data with exact precision. The fractional part of the number is determined by the informat or format because there is no separate mantissa and exponent.
What is the difference between Comp-1 Comp-2 and Comp 3?
How do you read COMP 3 value?
Why do we use comp 3 in COBOL?
COBOL Comp-3 is a binary field type that puts (“packs”) two digits into each byte, using a notation called Binary Coded Decimal, or BCD. This halves the storage requirements compared to a character, or COBOL “display”, field.
How do you measure Comp 3?
How many bytes would S9 9 v9999 Comp-3 occupy?
For s9(3)v99 comp-3. system will take (5+1)/2 = 3bytes..
How many bytes will S9 4 Comp-3 occupy?
It occupies 5 bytes.
Can COBOL display Comp variable 3?
Suppose if you have mentioned a field in COMP-3 format in cobol,that field appears in the generated file (in “VIEW” mode) as a packed decimal format.so,if you want see that field in decimal format write a simple sort card for expanding that filed using “EDIT” keyword.
Can Comp-3 be converted to numeric?
You cannot move a COMP-3 variable to alphanumeric directly. It will not give a SOC7 error but will you give you a return code 12 stating that comp-3 and alphanumeric variables did not follow the move compatibility rule. 01 A1 PIC S9(4) COMP-3 VALUE 1234.
Can we move comp3 to comp3?
Re: Move comp-3 to comp-3.
If the sending field has more digits to the left (or right) of the decimal point than the receiving field, truncation will occur. If the sending field has fewer digits to the left (or right) of the decimal point, zero will be used to fill the extra positions.
What is packed decimal in COBOL?
Packed-decimal format means that each byte of storage (except for the low order byte) can contain two decimal numbers. The low-order byte contains one digit in the leftmost portion and the sign (positive or negative) in the rightmost portion.
How is packed decimal stored?
A packed decimal representation stores decimal digits in each “nibble” of a byte. Each byte has two nibbles, and each nibble is indicated by a hexadecimal digit. For example, the value 15 is stored in two nibbles, using the hexadecimal digits 1 and 5. The sign indication is dependent on your operating environment.
Can we move packed decimal to numeric in COBOL?
Resolution. This document describes how packed decimal values (Computational-3) can be converted to numeric values via File Master using COBOL copybooks. The only method to get this done is to use a File Master Reformat data set, aka. REFFILE.