swfit 第二天
import Foundation
class Hi{
init()
{
print("aaaa")
}
func sayHi(){
print("hi!~")
}
}
class Hello:Hi {
override func sayHi() {
print("hi!~2")
}
}
var hi = Hello()
hi.sayHi()
import Foundation
class Hi{
func sayHi(){
print("hi!~")
}
}
class Hello:Hi {
override func sayHi() {
print("hi!~2")
}
}
var hi = Hello()
hi.sayHi()
class Hi{
func sayHi(){
print("hi!~")
}
}
var hi = Hi()
hi.sayHi()
import Foundation
func a(b:Int)->(Int,Int)
{
//print("\(b)")
return(b+1,b+2)
}
let (c,d) = a(0)
print(c)
import Foundation
func a(b:Int)
{
print("\(b)")
}
a(2)
var a:String?="cai"
if let b=a
{
print(b)
}
import Foundation
for index in 0 ... 10
{
if index%2 == 0
{
print(index)
}
}
import Foundation
var arr = [String]()
for a in 0 ... 10
{
arr.append("a=\(a)")
//print("this nubmer is\(a)")
}
for a in arr{
// print(a)
}
var i = 0
while i < 10
{
i++
// print(arr[i])
}
var d = ["name":"cai","age":"18"]
for(j,k) in d
{
print(j,k)
}
import Foundation
var arr = [String]()
for a in 0 ... 10
{
arr.append("a=\(a)")
//print("this nubmer is\(a)")
}
print(arr)
var arr = [String]()
for a in 0 ... 10
{
print("this nubmer is\(a)")
}
import Foundation
var a = ["name":"caibin","age":"18"]
a["sex"] = "female"
print(a["name"])
print(a["sex"])
if a["name"] != nil
{
var c: String! = a["name"]
var d = c
print(c)
}
import Foundation
let a = [75 , 43, 103, 87, 12]
var abc: String = "hi,baobao"
var i = 0, b = 3
let minValue = UInt8.min
let maxValue = UInt8.max
for i in a{
if(i>50)
{
print(String(i)+"i>50")
}else
{
print(String(i)+"i<50")
}
print(abc)
}
print(minValue)
print(maxValue)
//类别名
typealias abb = Int
var a1 = 11;
print(a1)
var bl = true
var i = 2
if i == 1 {
print("bl is ture")
}
else
{
print("bl is false")
}
print(bl)
var a = (404,"nihao")
var (b,c) = a
print(b)
print(c)
