20131120-接口字符串-小鸭子练习

[1]字符串字符反转

namespace 字符串字符反转

{

class Program

{

static void Main(string[] args)

{

//接收用户输入的一句英文,将其中的单词以反序输出。 "I love you"→"I evol uoy"

Console.WriteLine("请输入一句英文");

string str = Console.ReadLine();

//拆分字符串为单个单词

string[] words = str.Split(new char[] { ‘ ‘ }, StringSplitOptions.RemoveEmptyEntries);

for (int i = 0; i < words.Length; i++)

{

words[i] = FanZhuan(words[i]);

}

//单个单词-->字符串

str = String.Join(" ", words);

Console.WriteLine(str);

Console.ReadKey();

}

public static string FanZhuan(string str)

{

char[] chars = str.ToCharArray();

char temp = ‘ ‘;

for (int i = 0; i < chars.Length / 2; i++)

{

temp = chars[i];

chars[i] = chars[chars.Length - i - 1];

chars[chars.Length - i - 1] = temp;

}

return new string(chars);

}

}

}

[2]小鸭子案例

20131120-接口字符串-小鸭子练习

namespace 小鸭子案例

{

class Program

{

static void Main(string[] args)

{

Duck[] ducks = { new realDuck(), new woodDuck(), new rubberDuck() };

//ISwim[] Animal = {new Dog(), };

//IBark[] Barker;

foreach (Duck item in ducks)

{

//用多态,用父类实现多态

item.Swim();

if (item is realDuck||item is rubberDuck)

{

//就是要用多态,用接口实现多态

((IBark)item).Bark();

}

}

Console.ReadKey();

}

}

//只有两个单词 interface和借口名,没有public,默认internal

interface IBark

{

//public修饰多余

void Bark();

}

interface ISwim

{

void Swim();

}

//动物也可以继承ISwim接口

public abstract class Animal : ISwim

{

public abstract void Swim();

}

//

public class Dog : Animal

{

public override void Swim()

{

Console.WriteLine("我是乖乖狗,我的泳姿很特");

}

}

public abstract class Duck

{

public abstract void Swim();

}

public class woodDuck : Duck

{

public override void Swim()

{

Console.WriteLine("我是木头鸭子,但我游泳游的可好了");

}

}

public class realDuck : Duck, IBark

{

public override void Swim()

{

Console.WriteLine("我是真鸭子,天生会游泳");

}

public void Bark()

{

Console.WriteLine("我是真鸭子,嘎嘎嘎嘎嘎");

}

 

}

public class rubberDuck : Duck, IBark

{

public override void Swim()

{

Console.WriteLine("我是橡胶鸭子,但我会游泳,哈哈");

}

public void Bark()

{

Console.WriteLine("我是橡胶鸭子,吱吱吱吱吱吱叫");

}

}

}

[*]登记案例

20131120-接口字符串-小鸭子练习

namespace 登记案例

{

class Program

{

static void Main(string[] args)

{

American american = new American();

Chinese chinese = new Chinese();

Car car = new Car();

House house = new House();

IRegistration[] ireg = {american,chinese,car,house };

for (int i = 0; i < ireg.Length; i++)

{

ireg[i].Registration();

}

Console.ReadKey();

}

public static void DengJi(IRegistration ireg)

{

ireg.Registration();

}

}

interface IRegistration

{

void Registration();

}

public class Person

{

}

//两人

public class American : Person, IRegistration

{

public void Say()

{

Console.WriteLine("我是美国人");

}

 

public void Registration()

{

Console.WriteLine("美国人已经登记");

}

}

public class Chinese : Person, IRegistration

{

public void Say()

{

Console.WriteLine("我是中国人");

}

public void Registration()

{

Console.WriteLine("中国人已经登记");

}

}

//两物

public class Car : IRegistration

{

public void Registration()

{

Console.WriteLine("我的蝙蝠车已经登记");

}

}

public class House : IRegistration

{

public void Registration()

{

Console.WriteLine("我的房子已经登记");

}

}

 

}

20131120-接口字符串-小鸭子练习

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