Joined: 06 Jun 2008 Posts: 8154 Location: East Dubuque, Illinois, USA
This appears to be floating point data -- which you didn't specify in your post. Terminology is critical in IT, where similar terms may mean very different things. "Double word" means that 8 bytes are used -- those 8 bytes could be character data (EBCDIC, ASCII, or some code page), packed decimal, floating point, zoned decimal or even binary. Specifying "double word" without specifying the precise format can waste everybody's time if we're assuming one format is being used and that's not the format you are referencing. For example, hex '97994D' is a three-character hex field. If it is considered a packed decimal number, the value is -97994. If it is considered an EBCDIC character string, the value is pr(. Which is it? That depends upon what the application is looking for.
Assuming you are talking about floating point numbers, the format is:
first bit -- sign (0 postiive, 1 negative)
next 7 bits -- exponent (in excess-64 notation), so 40 (hex 64) means the value is times 10 to the zero power.
next 56 bites -- mantissa with implied decimal point before the first digit.
Hence 4211000000000000 is equivalent to hex 11, or decimal 17
Thanks for the clarification. As I told you I was just dumping each data type and was curious to see the values. I saw these values in the compiler listing. Lo now I see that if I give a D'17' then it will be represented in floating point form. This is good learning.
Thanks for the clarification frens. I will keep in mind the terminology whenever I query from now on.