函数和闭包
使用元组来让一个函数返回多个值。该元组的元素可以用名称或数字来表示。
func calculateStatistics(scores: [Int]) -> (min: Int, max: Int, sum: Int) {
var min = scores[0]
var max = scores[0]
var sum = 0
for score in scores {
if score > max {
max = score
} else if score < min {
min = score }
sum += score }
return (min, max, sum)
}
let statistics = calculateStatistics(scores:[5, 3, 100, 3, 9])
print(statistics.min)
print(statistics.0)
