15 int digits and 3 decimal digits number problem in CR for VS 2005

Question

Post Author: condeagustin
CA Forum: Crystal Reports
HiIm using the Crystal Reports that comes with VS 2005 and I'm having a problem showing a number with 15 int digits and 3 decimal digits. In my tests, for example I have a formula that only has this line of code:  356125478123456.251I want the report to show  356,125,478,123,456.251 but it shows  356,125,478,123,456.000Why does CR puts 000 when it has to be a 251!!! WHY?!!!! I have tried to put the number as a string and I have tried a lot of functions like Round, Truncate, ToText, CDbl, etc and it's always the same result. In the format object of that formula the decimals are 1.000 and the rounding is 0.001. And the following is the weirdest part:If, instead of 356125478123456.251 I put 56125478123456.251, CR shows 56,125,478,123,456.300If then I put  6125478123456.251 CR shows 6,125,478,123,456.250And then if I put 125478123456.251 CR SUCCESFULLY shows 125,478,123,456.251 That is the way I want it but with 15 int digits. It looks like CR only works with a maximum of 12 int digits, more than that, the decimals don't work. How can I fix this? Please help me!Kind regards,Agustín Conde 

Answer 1

Post Author: Ken Wong
CA Forum: Crystal Reports
Hi Agustin,
Crystal Reports uses signed doubles as its datatype for numbers.  A signed double on a 32 bit machine is represented by 8 bytes.  1 sign bit, 11 exponent bit, and 52 bit for the mantissa. This roughly corresponds to 15 digits of total precision in decimal; ie. it does not matter where your dot is. You have 15 digits before and after the decimal point combined.
This behavior is pretty standard.  You should see similar behavior in applications such as excel.
Hope this helps,
Ken