1 using System; 2 using System.Collections.Generic; 3 using System.Linq; 4 using System.Text; 5 6 namespace sum 7 { 8 class Class1 9 { 10 public interface Calculator //声明计算接口 11 { 12 double Cal(double x, double y); 13 } 14 private double x; //定义x变量； 15 16 public double X //封装字段 17 { 18 get { return x; } 19 set { x = value; } 20 21 } 22 private double y; //定义y变量 23 24 25 public double Y //封装字段 26 { 27 get { return y; } 28 set { y = value; } 29 30 } 31 public class Add : Calculator //接口法运算 32 { 33 public double Cal(double x, double y) 34 { 35 double result = 0; 36 result = x + y; 37 return result; 38 } 39 } 40 public class Sub : Calculator 41 { 42 public double Cal(double x, double y) 43 { 44 double result = 0; 45 result = x - y; 46 return result; 47 } 48 } 49 public class Mul : Calculator 50 { 51 public double Cal(double x, double y) 52 { 53 double result = 0; 54 result = x * y; 55 return result; 56 } 57 } 58 public class Div : Calculator 59 { 60 public double Cal(double x, double y) 61 { 62 double result = 0; 63 result = x / y; 64 return result; 65 } 66 } 67 public class Opear //定义运算符 68 { 69 private Calculator calculate; 70 public Opear(Calculator calculate) 71 { 72 this.calculate = calculate; 73 } 74 public double Cal(double x, double y, String op) //返回运算结果 75 { 76 return this.calculate.Cal(x, y); 77 } 78 } 79 } 80 }
策略模式引用：
1 private void textBox8_KeyDown(object sender, KeyEventArgs e) 2 { 3 sum.Class1.Opear opear = null; 4 double x = Convert.ToDouble(textBox5.Text); //为相关的变量赋值 5 double y = Convert.ToDouble(textBox7.Text); 6 string op = textBox6.Text; 7 switch (op) 8 { 9 case "+": 10 opear = new sum.Class1.Opear(new sum.Class1.Add()); //策略模式的引用 11 break; 12 case "-": 13 opear = new sum.Class1.Opear(new sum.Class1.Sub()); 14 15 break; 16 case "*": 17 opear = new sum.Class1.Opear(new sum.Class1.Mul()); 18 19 break; 20 case "/": 21 opear = new sum.Class1.Opear(new sum.Class1.Div()); 22 23 break; 24 default: 25 break; 26 } 27 28 if (e.KeyCode == Keys.Enter) 29 { 30 string answer = opear.Cal(x, y, op).ToString(); 31 if (textBox8.Text ==answer.ToString()) 32 { 33 MessageBox.Show("回答正确"); 34 Count++; 35 Right++; 36 } 37 else 38 { 39 MessageBox.Show("回答错误"); 40 Count++; 41 }
运行结果：
保存出好的题
