/**

（6）只读计算属性

Swift计算属性中只提供了getter方法

对应 OC中的 readonly

*/

struct MyStudent {

var name: String

var chinese: Double

var math: Double

func showMySelf() -> Void {

print("姓名:\(@H_502_121@name),语文成绩:\(@H_502_121@chinese),数学成绩:\(@H_502_121@math)")

}

}

class MyClass {

var members:[@H_502_121@MyStudent] = []

var average: Double {

// 也可以省略 get函数

// get {

var t: Double = 0.0

for i in @H_502_121@members {

t += i.@H_502_121@chinese

t += i.@H_502_121@math

}

if @H_502_121@members.count > 0 {

return t / Double(@H_502_121@members.count)

} else {

return 0

}

// }

}

func show() -> Void {

for i in @H_502_121@members {

i.showMySelf()

}

}

}

let s0 = @H_502_121@MyStudent.init(name: "zhangsan",chinese: 100.0,math: 100.0)

let s1 = @H_502_121@MyStudent.init(name: "lisi",chinese: 90.0,math: 90.0)

let c0 = @H_502_121@MyClass.init()

c0.@H_502_121@members.append(s0)

c0.@H_502_121@members.append(s1)

c0.show()

// 只读计算属性，我们看到给它赋值是不可以的

// c0.average = 900.0

print(c0.@H_502_121@average)