swift -switch

import UIKit

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
       // demo(num: 10 )
        
         demo(num: "8" )
    }
    
    // swith 可以针对任意类型的值进行分支，不再局限整数
   //  如果用多值  用 ,隔开
    func demo(num:String)  {
       
        switch num {
        case "9","10":
            print("优秀")
        default:
             print("一般")
        }
        
    }
    
    
    func demo1(  )  {
        let point = CGPoint(x: 10, y: 10)
        
        switch point {
        case let p where p.x == 0 && p.y == 0 :
            print("原点")
            
        case let p where p.x == 0  :
            print("Y轴")
            
        case let p where p.y == 0 :
            print("X轴")
            
        case let p where abs(p.x) == abs(p.y) :
            print("对角线")
        default:
            print("其他")
        }
        
    }


}