Subtraction

An employee at a renowned bank unexpectedly discovered a flaw in some of the bank's operational software: the subtraction of one number from another occasionally yields incorrect results, which, of course, poses a potential security threat to the bank. For instance, a client reported that after withdrawing $125$ from an account balance of $296$, the account was inexplicably empty, although it should have had $171$ remaining.

You must urgently develop a straightforward yet crucial program that correctly performs the subtraction of one number from another before electronic thieves can exploit this vulnerability in the security system.