swift中需要对参数只进行修改,需要用到inout 关键字,调用函数时加&
func swapTwoInts(_ a:inout Int,_ b: inout Int){
let temporaryA = a
a = b
b = temporaryA
}
swapTwoInts(&numb1, &numb2)
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func swapTwoInts(_ a:inout Int,_ b: inout Int){
let temporaryA = a
a = b
b = temporaryA
}
swapTwoInts(&numb1, &numb2)
更多相关内容请点击主页查看…
