【设计模式】——策略模式之赌球风波

前提摘要：

今天晚上世界杯进行淘汰赛，一场重头戏是巴西队和智利队。小华是内马尔的粉丝，他希望巴西队能赢，小玉认为智利队是黑马，能赢巴西队。于是二人打赌，赌资为每个球10元，比如两队进5球，则输的一方需出50元；小华又加了一条，如果内马尔进球则赌资加10元；小玉又加了一条，如果两队90分钟之内打平，需点球决胜负，则说明两队实力相近，赌资减少20%

策略模式：

围绕赌资的多少，抽象出一个父类，然后三个具体算法类继承父类，再用一个策略选择类为算法类和界面类承上启下，界面部分根据相应要求给出代码！结构图为：



编写代码：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace 策略模式
{
public partial class 赌球那点事 : Form
{
public 赌球那点事()
{
InitializeComponent();
}

//赌资抽象类
abstract class CashSuper
{
public abstract double acceptCash(double money);
}

//正常情况下赌资子类
class CashNormal : CashSuper
{
public override double acceptCash(double money)
{
double result = money;
return money;
}
}

//内马尔进球后的赌资
class CashAdd : CashSuper
{
private double goalsNeymar = 0.0d;
private double moneyAdd = 0.0d;
public CashAdd(string goalsNeymar, string moneyAdd)
{
this.goalsNeymar = double.Parse(goalsNeymar);
this.moneyAdd = double.Parse(moneyAdd);
}
public override double acceptCash(double money)
{
double result = money;
if (goalsNeymar > 0)
result = money + goalsNeymar * moneyAdd;
return result;
}
}

//90分钟未分胜负，需点球时赌资
class CashRebate : CashSuper
{
private double moneyRebate = 1d;
public CashRebate(string moneyRebate)
{
this.moneyRebate = double.Parse(moneyRebate);
}
public override double acceptCash(double money)
{
return money * moneyRebate;
}
}

//CashContext类
class CashContext
{
private CashSuper cs;
public CashContext(CashSuper csuper)
{
this.cs = csuper;
}
public double GetResult(double money)
{
return cs.acceptCash(money);
}
}

private void button3_Click(object sender, EventArgs e)
{
double total = 0.0d;
CashContext cc = null;
switch (cmbType.SelectedItem .ToString())
{
case "正常计算":
cc = new CashContext(new CashNormal());
break;
case "内马尔进球":
cc = new CashContext(new CashAdd("1", "10"));
break;
case "点球大战":
cc = new CashContext(new CashRebate("0.8"));
break;
}
double totalPrices = 0d;
totalPrices = cc.GetResult (Convert.ToDouble(txtPrice.Text) * Convert.ToDouble(txtNum.Text));
total = total + totalPrices;
txtShow.Text = "单价：" + txtPrice.Text + "进球数：" + txtNum.Text
+ " " + cmbType.SelectedItem + " 合计：" + totalPrices.ToString();
label10.Text = total.ToString();
}

private void 赌球那点事_Load(object sender, EventArgs e)
{
cmbType.Items.AddRange(new object[] { "正常计算", "内马尔进球", "点球大战" });
cmbType.SelectedIndex = 0;
}
}
}

运行：
假如巴西3:2智利，内马尔有进球，则：



这场赌球风波到底结局如何，再过几个小时就知道了！