import Foundation 
enum KfcError: Error { 
case insufficientAmount(message: String) 
} 
func kfcOffer(thankAmount: Int) throws { 
if thankAmount >= 50 { 
print(“KFC Crazy Thursday Offer Accepted! 🍗”) 
} else { 
throw KfcError.insufficientAmount(message: “Whoever gives me 50 CNY, I will thank him and get KFC!”) 
} 
} 
do { 
try kfcOffer(thankAmount: 0) 
} catch KfcError.insufficientAmount(let messa...