Practice · 3 of 3
Debug: The Discount That Pays Customers
CHALLENGE
Difficulty: intermediate+25 XP
A checkout bug report: one customer paid 50 for a 150%-off coupon and the balance went NEGATIVE. Fix ApplyDiscount so percent is clamped to [0, 100] before use. CountNonEmpty is correct — leave it alone.
``csharp
static void ApplyDiscount(ref decimal price, decimal percent);
static int CountNonEmpty(params string?[] items);
``
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