Swift--Protocol, extension

Protocol exampleprotocol{

var simpledescription:string{get}

Mutating func adjust ()

}

Class simpleclass:exampleprotocol{

var simpledescription:string = "A very simple class"

var anotherproperty:int = 69105

Func Adjust () {

Simpledescription + = "Now 100% requested"

}

}

var a = Simpleclass ()

Print (a.simpledescription)

A.adjust ()

Print (a.simpledescription)

struct simplestructure:exampleprotocol{

var simpledescription:string = "A Simple Structure"

Mutating func adjust () {

Simpledescription + = "(adjust)"

}

}

var B = simplestructure ()

Print (b.simpledescription)

B.adjust ()

Print (b.simpledescription)

Extension int:exampleprotocol{

var simpledescription:string{

Return "the number is \ (self)"

}

Mutating func adjust () {

Self + = 50

}

}

println (7.simpleDescription)

Extension string:exampleprotocol{

var simpledescription:string{

Return "My name is \ (self)"

}

Mutating func adjust () {}

}

Print ("xingxing". Simpledescription)

Swift--Protocol, extension