这是Apple的SwiftProgrammingBook中的代码示例(在章节:Deinitializers中)structBank{staticvarcoinsInBank=10_000staticfuncvendCoins(coins:Int)->Int{varcoinsToVend=min(coins,coinsInBank)coinsInBank-=coinsToVendreturncoinsToVend}staticfuncreceiveCoins(coins:Int){coinsInBank+=coins}}classMyPlayer{varcoinsInPurse:Inti