NGUYEN Adam wrote:

>

> Can you better explain that last example about the fraction of a

> cent? I can't understand it very well.

Yes, sorry.

Early on, (1960s?) some clever guys looked at banking programs and noticed that

interest is calculated down to fractions of a cent. Supposing interest on

$100.00 is currently $0.055 or five and a half cents. Now if you demand your

money, I can't very well pay you the half cent. (At least not if we are talking

US Dollars.)

But computers track this stuff well! So supposed I change the banking program

that calculates savings account interest to take any fraction of a cent that is

generated by interest, and instead of paying it to the deserving account, the

program puts it in my account. The banks clients won't notice their missing

fractions of a cent. But, if the bank has thousands of customers earning

interest every day, my program will be saving thousands times a fraction of a

cent into my account every day. It mounts up quickly. The progam that checks

the banks ledgers will not detect an error since the total amount of money is

unchanged. The theft goes unnoticed... (Except today bank regulators have

procedures to guard against this.)

tex