FA-85715 / Ride-hailing fare and surge pricing / Member archive

Card payments rounded to the cash step · case 05

Swiss card payments are rounded to 5 centimes.

Member previewVariant 5 · 3 implementations · 7 checks per implementation

Case contract

Convert a fare to the payment currency with the directed rate fx[FROM+TO] = [num, den] (half up), then, for cash payments only, round half up to the payment currency cash step (CHF 5 centimes, SEK 100 ore, others 1). Card and wallet payments are not cash-rounded. Return the amount in minor units of the payment currency.

Why this case matters

Ride-hailing prices are computed per trip at scale; ordering, unit and boundary slips become systematic over- or under-charging.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
regression: cash-only rounding	`2000`	`1999`	Failed

MEMBER ARCHIVE

The complete case is available to members.

This record includes three runnable implementations, regression fixtures, execution results, and source hashes.

Member access is invitation-based. Sign in with your invited account to inspect the sources.