Probably the difference between the numbers is very small, for example, one millionth or less. You will sometimes get this type of rounding errors, because numbers stored as real numbers are never 100% exact.
Instead of checking whether A = B, check whether
abs(A-B) < 1e-6 (one millionth), for example.
>Hi.
>I have a procedure which parses text files.
>Many times i have to n_Var=Val(Substr(c_Line,x,y))
>At the end of parsing i get two numbers which has to match in order for the file to be acnowledged. Recently while processing a file the programm gave warning that the numbers did not match. Upon further investigation it turned out that the numbers looked the same when ?n_Var, but ?n_Var1-n_Var2 showed -0.
>The only difference between that file and thousands of other files was that the numbers were large in the order of trillions. Still trillions is within FoxPro's range.
>The question is why -0, and how to avoid it.
>
>Thank you.
>Kamil
Difference in opinions hath cost many millions of lives: for instance, whether flesh be bread, or bread be flesh; whether whistling be a vice or a virtue; whether it be better to kiss a post, or throw it into the fire... (from Gulliver's Travels)
