2022年8月26日 · In COBOL, a programmer is allowed to specify the internal form of the records items that allows you to facilitate its use in the maximum efficient way. COMPUTATIONAL and DISPLAY are the two general forms of internal representation. It is used to store and compress the storage space.

COMP-3 (or Packed Decimal or Packed Numeric) is a convenient way to represent and store decimal numbers in a compact binary-coded decimal (BCD) format, which is efficient for arithmetic operations.

2009年7月9日 · Usually COMP-3 fields consist of BCD digits packed into bytes two at a time, each digit using a nibble (4 bits). The last digit goes in the upper nibble of the last byte.

2024年9月11日 · Advantages of COMP-3. Precision in Storage: Still, COMP-3 results in accurate representation of both a decimal number making it essential for performing common financial computations. Compact Storage: Further, the COMP-3 code inflates the density of any numeric field by packing two digits into a single byte.

WS-AREA variable is declared as COMP-3, with a signed byte plus 6 digits. A total of 7 bytes and the (n+1)/2 formula will apply as n is an odd number. So, a total of 8/2 = 4 bytes allocated for WS-AREA.

2006年2月1日 · Comp-3 is packed decimal while Comp-4 is the same as Comp and it holds binary value. Let us say Pic S9 (8) Comp-3, this will occupy 5 bytes which is 8/2+1. This one can hold a max of 8 digit number. Pic S9 (8) Comp & Comp-4 will occupy 4 bytes and is called a full word binary. 9 (4) is called half word binary.

2021年1月18日 · COMP-3 (PACKED-DECIMAL) data items are used in COBOL because they maintain a fixed number of decimal points. All computations lead to a result having the prescribed number of decimal points. This is particularly useful in accounting type operations.

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.

cobol How does the computational work in cobol? COMP-3. Data item is stored in packed decimal format in COMP-3. Packed-decimal format means that each byte of storage (except for the low order byte) can contain two decimal numbers.

2019年9月8日 · COMP-3 allows Signed packed decimal item where the sign will store on least significant digit (rightmost lower nibble). In COMP-3 Sign always table one nibble so always even number of nibbles allocated.