Discount, but never below the floor
Sales can discount freely, except that a contract sets a price the item may never go under.
- Apply the percentage, then lift the result back up to the floor if it went under.
- A floor above the list price wins — the item simply sells at the floor.
- A percentage outside 1 to 100 means no discount at all.
discountWithFloor(price: int, percent: int, floorPrice: int) → int
Go needs a compiler and Drill does not host one yet, so this page is the reference rather than an exercise: the problem, worked examples, and the solution in full. To type it out, the same problem runs in Python.
Where you start
func discountWithFloor(price int, percent int, floorPrice int) int {
}Worked examples
| Call | Result |
|---|---|
discountWithFloor(1000, 20, 500) | 800 |
discountWithFloor(1000, 70, 500) | 500 |
discountWithFloor(1000, 20, 1200) | 1200 |
discountWithFloor(1000, 0, 500) | 1000 |
Hint
Two steps, in order: discount, then clamp.
Reference solution in Go
func discountWithFloor(price int, percent int, floorPrice int) int {
cut := price
if percent >= 1 && percent <= 100 {
cut = price - price*percent/100
}
if cut < floorPrice {
return floorPrice
}
return cut
}