Two random Numbers

对两个随机数进行四则运算

two/Add.java

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+/**
+ * Add类为Randoms类的子类
+ * 该类中进行加法运算
+ */
+package cn.deu.ccut.two;
+
+public class Add  {
+	public void add(double number,double a,double b) {
+		int c;
+		int d;
+		char opera[]= {' ','(',')'};//Opera[0]~Opera[2]依次输出“ （空格）”，“（”，“）”
+			if(a>=0) {
+				c=0;
+			}else {
+				c=1;
+			}
+
+			if(b>=0) {
+				d=0;
+			}else {
+				d=1;
+			}
+
+		if(a+b<=number) {
+			System.out.println(opera[c]+a+opera[c*2]+"+"+opera[d]+b+opera[d*2]+"=");
+
+			}else {
+				a=(int)a/2;
+				b=(int)b/2;
+				System.out.println(opera[c]+a+opera[c*2]+"+"+opera[d]+b+opera[d*2]+"=");
+			}
+	}
+}

two/Chengchu.java

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+package cn.deu.ccut.two;
+
+import java.util.Scanner;
+
+public class Chengchu {
+	int a;
+	public double chengchu() {
+	Scanner sc=new Scanner(System.in);
+	try {	
+		System.out.print("是否包含乘除运算，是按1，否按任意数字：");
+		 a=sc.nextInt();
+
+	} catch (Exception e) {
+		System.out.println("请输入正确的取值范围");
+		chengchu();
+		}
+
+	return a;
+	}
+}

two/Division.java

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+/**
+ * Division类为Randoms类的子类
+ * 该类中进行除法运算
+ */
+package cn.deu.ccut.two;
+
+public class Division {
+	public void division(double number,double a,double b) {
+		int c;
+		int d;
+		char opera[]= {' ','(',')'};//Opera[0]~Opera[2]依次输出“ （空格）”，“（”，“）”
+		if(a>=0) {
+			c=0;
+		}else {
+			c=1;
+		}
+		if(b>=0) {
+			d=0;
+		}else {
+			d=1;
+		}
+
+		if(a%b==0) {
+			System.out.println(opera[c]+a+opera[c*2]+"/"+opera[d]+b+opera[d*2]+"=");
+		}else {
+				b=(int)(b/10);
+				a=(int)(a%10);
+				a=a*(b+1);
+				System.out.println(opera[c]+a+opera[c*2]+"/"+opera[d]+b+opera[d*2]+"=");	
+		}
+	}
+}

two/Down.java

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+/**
+ * Down类是Primary的子类
+ * 该类控制题目数量
+ */
+package cn.deu.ccut.two;
+import java.io.*;
+import java.util.*;
+public class Down {
+
+	public double down() {
+		double b = 0;//运算式的个数
+		Scanner sc=new Scanner(System.in);
+		try {	
+				System.out.print("请输入题目的数量：");
+				b=sc.nextDouble();// 控制题目的数量
+
+			} catch (Exception e) {
+				System.out.println("请输入正确的取值范围");
+				down();
+			}
+		return b;
+	}
+}

two/Factory.java

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+/**
+ * Factory为工厂类，是Randoms的子类
+ * 利用switch语句进行运算法则的选择
+ * switch（0）为加法； switch（1）为减法； switch（2）为乘法； switch（3）为除法；
+ */
+package cn.deu.ccut.two;
+
+import java.util.Random;
+
+public class Factory extends Randoms{
+	Random rand =new Random();	
+	public void factory(double max,double a,double b) {
+		int i=0;
+			switch(rand.nextInt(r)) {	
+				case 0:
+					i++;
+					Add ad=new Add();
+					ad.add(max,a,b);
+					break;
+				case 1:
+					i++;
+					Minus mis=new Minus();
+					mis.minus(max,a,b);
+					break;
+				case 2:
+					i++;
+					Multiply mul=new Multiply();
+					mul.multiply(max,a,b);
+					break;
+				case 3:
+					i++;
+					Division div=new Division();
+					div.division(max,a,b);
+					break;
+
+		}	
+	}
+}

two/Fuhao.java

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+package cn.deu.ccut.two;
+
+import java.util.Scanner;
+
+public class Fuhao {
+	int a;
+	public double fuhao() {
+	Scanner sc=new Scanner(System.in);
+	try {	
+		System.out.print("是否包含负数，是按1，否按其他数字：");
+		 a=sc.nextInt();
+
+	} catch (Exception e) {
+		System.out.println("请输入正确的取值范围");
+		fuhao();
+		}
+
+	return a;
+	}
+}

two/Minus.java

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+/**
+ * Minus类为Randoms的子类
+ * 在该类中进行加法运算
+ */
+package cn.deu.ccut.two;
+
+public class Minus{
+	public void minus(double number,double a,double b) {
+		int c;
+		int d;
+		char opera[]= {' ','(',')'};//Opera[0]~Opera[2]依次输出“ （空格）”，“（”，“）”
+			if(a<0) {
+				c=1;
+			}else {
+				c=0;
+			}
+			if(b<0) {
+				d=1;
+			}else {
+				d=0;
+			}
+		if(a>b) {
+			System.out.println(+opera[c]+a+opera[c*2]+"-"+opera[d]+b+opera[d*2]+"=");
+		}else {
+			System.out.println(+opera[c]+a+opera[c*2]+"-"+opera[d]+b+opera[d*2]+"=");
+		}
+	}
+}

two/Multiply.java

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+/**
+ * Multipiy类为Randoms类的子类
+ * 该类中进行乘法运算
+ */
+package cn.deu.ccut.two;
+
+public class Multiply {
+	public void multiply(double number,double a,double b) {
+		int c;
+		int d;
+		char opera[]= {' ','(',')'};//Opera[0]~Opera[2]依次输出“ （空格）”，“（”，“）”
+			if(a>=0) {
+				c=0;
+			}else {
+				c=1;
+			}
+			if(b>=0) {
+				d=0;
+			}else {
+				d=1;
+			}
+		if(a*b<=number) {
+			System.out.println(opera[c]+a+opera[c*2]+"*"+opera[d]+b+opera[d*2]+"=");
+			}else {
+				a=a%10;
+				b=b%10;
+			System.out.println(opera[c]+a+opera[c*2]+"*"+opera[d]+b+opera[d*2]+"=");
+			}
+	}
+}

two/Primary.java

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+/**
+ * PrimaryÀàÖÐ
+ */
+
+package cn.deu.ccut.two;
+import java.awt.font.NumericShaper.Range;
+import java.util.Scanner;
+public class Primary {
+	public static int scope1;
+	public static int scope2;
+
+	public static void main(String[] args) {
+		Shut shu=new Shut();
+		shu.shut();
+
+		Down dow=new Down();
+		System.out.println(dow.down());
+
+		Rantwo rant=new Rantwo();
+		rant.rantwo();	
+		}
+
+}

two/Randoms.java

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+/**
+ * Randoms类实现功能（1）————自动生成10道100以内的2个操作数的四则运算算式（+ - *  /），要求运算结果也在100以内
+ * 在Randoms类中定义了两个成员变量a和b
+ * 在ranDoms方法中调用工厂类——Factory中的factory方法实现功能（1）
+ */
+package cn.deu.ccut.two;
+import java.util.Scanner;
+import java.util.Random;
+import java.io.FileNotFoundException;
+import java.io.PrintStream;
+
+import java.math.BigInteger;
+public class Randoms {
+
+		static double number=100;
+		static double b=10;
+		static int t=0;
+		static int r=4;
+		static Random rand =new Random();
+
+	public static void main(String[] args) throws FileNotFoundException {
+		PrintStream ps = new PrintStream("d:/result.txt");
+			Scanner sc=new Scanner(System.in);
+			Fuhao fu=new Fuhao();
+			Chengchu che=new Chengchu();
+
+			ranDoms();
+
+					t= (int) fu.fuhao();	
+					r=(int) che.chengchu();
+					if(r!=1) {
+						r=2;
+					}else {
+						r=4;
+					}
+					 Shut shu=new Shut();
+					 number = shu.shut();
+					 Down dow=new Down();
+					 b=dow.down();
+					 System.setOut(ps);
+					 ranDoms();
+
+		}
+	public static void ranDoms(){
+		Scanner sc=new Scanner(System.in);
+		for(int i=0;i<b;i++){
+		double a= rand.nextInt((int)number);
+		double b= rand.nextInt((int)number);
+		if(t==1) {
+			a=((rand.nextInt(2))==1?-1:1)*a;
+			b=((rand.nextInt(2))==1?-1:1)*b;
+		 }
+		Factory fac=new Factory();
+		fac.factory(number,a,b);
+		}
+	}
+
+
+
+
+}
+

two/Rantwo.java

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+/**
+ * Rantwo类是Primary类的子类
+ * 该类随机生成两个随机数组
+ */
+package cn.deu.ccut.two;
+
+public class Rantwo extends Primary {
+	public void rantwo() {
+
+	}
+}

two/Shut.java

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+/**
+ * Shut类是Primary类的子类
+ * 该类控制输入的题目数值的取值范围
+ */
+
+package cn.deu.ccut.two;
+
+
+import java.io.*;
+import java.util.*;
+
+public class Shut {
+
+	static double shut() {
+		Scanner sc=new Scanner(System.in);
+		 double a=0;//运算数的取值范围
+
+		try {	
+				System.out.print("请输入操作数的范围：");
+				a=sc.nextDouble();// 控制题目数值的取值范围
+
+			} catch (Exception e) {
+				System.out.println("请输入正确的取值范围");
+				shut();
+			}
+		return a;
+	}
+}

two/Test.java

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+/**
+ * 创建Randoms类的对象ran，并利用ran对象调用Randoms函数中的ranDoms方法实现功能（1）
+ * 
+ */
+package cn.deu.ccut.two;
+import java.util.Scanner;
+import java.io.FileNotFoundException;
+import java.io.PrintStream;
+import java.util.Random;
+public class Test {
+
+	public static void main(String[] args) {
+		Randoms rand=new Randoms();
+		rand.ranDoms();
+
+
+	} 
+
+}