import java.util.Random;
import java.util.Scanner;
 class Fenshu{
    static int fenzi1;
    static int fenmu1;
    static int fenzi2;
    static int fenmu2;
    public static void fenshu()//分数随机产生
    {
        Random random=new Random();
         fenmu1=(random.nextInt(10)+1);
         fenzi1=(random.nextInt(10)+1);
         fenmu2=(random.nextInt(10)+1);
         fenzi2=(random.nextInt(10)+1);
        if(fenmu1<=fenzi1||fenmu2<=fenzi2)
        {
            fenshu();
        }
        //System.out.println(fenmu1);
        //System.out.println(fenzi1);
        //System.out.println(fenmu2);
        //System.out.println(fenzi2);
          
    }
    public static char fuhao()//符号随机产生
    {
    char a =0;
    Random random=new Random();
    int f=random.nextInt(4);
    if(f==0)
          a=‘+‘;
    if(f==1)
          a=‘-‘;;
    if(f==2)
          a=‘*‘;
    if(f==3)
          a=‘/‘;
    return a;
    }
public static int GYS(int m, int n)   // 循环实现
      {
        int k,y;
        if(m<n)
        {
          k=m;
          m=n;
          n=k;
        }
        while(m%n!=0)
        {
         y=m%n;
         m=n;
         n=y; 
        }
        return n;
      }
    public static void zhenoutput()//真分数输出
    {
        fenshu();
        char a1=fuhao();
        if(a1==‘+‘)
        {
            int jieguo1=fenmu1*fenmu2;
            int jieguo2=fenzi1*fenmu2+fenzi2*fenmu1;
            int a=GYS(jieguo1,jieguo2);
            System.out.println(fenzi1+"/"+fenmu1+"+"+fenzi2+"/"+fenmu2+"="+jieguo2/a+"/"+jieguo1/a);    
        }
        if(a1==‘-‘)
        {
            int jieguo1=fenmu1*fenmu2;
            int jieguo2=fenzi1*fenmu2-fenzi2*fenmu1;
            int a=GYS(jieguo1,jieguo2);
            System.out.println(fenzi1+"/"+fenmu1+"-"+fenzi2+"/"+fenmu2+"="+jieguo2/a+"/"+jieguo1/a);    
        }
        if(a1==‘*‘)
        {
            int jieguo1=fenmu1*fenmu2;
            int jieguo2=fenzi1*fenzi2;
            int a=GYS(jieguo1,jieguo2);
            System.out.println(fenzi1+"/"+fenmu1+"*"+fenzi2+"/"+fenmu2+"="+jieguo2/a+"/"+jieguo1/a);    
        }
        if(a1==‘/‘)
        {
            int jieguo1=fenmu1*fenzi2;
            int jieguo2=fenzi1*fenmu2;
            int a=GYS(jieguo1,jieguo2);
            System.out.println(fenzi1+"/"+fenmu1+"/"+fenzi2+"/"+fenmu2+"="+jieguo2/a+"/"+jieguo1/a);    
        }
    }    
}
public class Size {
     
     static int n;
     static int m;
public static void main(String args[])
{
    
    Fenshu a=new Fenshu();
    boolean p=true;
    while(p)
    {
    
    Scanner in=new Scanner(System.in);
    System.out.println("1.整式计算 2.真分数计算");
    int ch=in.nextInt();
    if(ch==1)
    {
    System.out.println("请输入你要取得数值的范围：");
    Scanner in1=new Scanner(System.in);
    n=in1.nextInt();
    m=in1.nextInt();
    System.out.print("请确认你要计算的题目中是否包括乘除法：1、包括2、不包括");
    int c=in.nextInt();
    if(c==1)
    {
    System.out.println("请输入要计算的题的数量：");
    int number=in.nextInt();
    int i=0;
    while(i<number)
    {
      output();      
      i++;
    }    
    }
    if(c==2)
    {
         System.out.println("请输入要计算的题的数量：");
            int number=in.nextInt();
            int i=0;
            while(i<number)
            {
              output1();      
              i++;
            }        
    }
    }
    if(ch==2)
    {
    System.out.println("请输入要计算的题的数量：");
    int number=in.nextInt();
    int i=0;
    while(i<number)
    {
      Fenshu.zhenoutput();
      i++;
    }
    }
    }
}
public static int shuzi()//随机产生数字并且判断数值范围
    { 
       
        Random random=new Random();
        int a=(int)(Math.random()*(m-n+1)+n);
        //System.out.print(a);
        return a;
       
    }
public static void fuhao()//符号随机产生
    {
    Random random=new Random();
    int f=random.nextInt(4);
    if(f==0)
        System.out.print(‘+‘);
    if(f==1)
        System.out.print(‘-‘);
    if(f==2)
        System.out.print(‘*‘);
    if(f==3)
        System.out.print(‘/‘);
    }

public static void output()//整数计算包括乘除法
{
    //Scanner in1=new Scanner(System.in);
    
    int a=shuzi();
    int b=shuzi();
    
    Random random=new Random();
    
    int f=random.nextInt(4);  
    if(f==0)
    {
        System.out.print(a);
        System.out.print(‘+‘);
        System.out.print(b);
        System.out.println("="+(a+b));
    }
        
    if(f==1)
    {        
        System.out.print(a);
        System.out.print(‘-‘);
        System.out.print(b);
        System.out.println("="+(a-b));
        if(a-b<0)
        {           
            System.out.println("此次计算式式子结果为负数。");
        }
    }
    if(f==2)
    {
        System.out.print(a);
        System.out.print(‘*‘);
        System.out.print(b);
        System.out.println("="+(a*b));
    }
    if(f==3)
    {
        System.out.print(a);
        System.out.print(‘/‘);
        System.out.print(b);
        int c=a/b;
        System.out.println("="+c);
        int yushu=a-c*b;
        if(yushu!=0)
        {
            System.out.println("该式子不能整除，余数为"+yushu);
        }
        if(yushu==0)
        {
            System.out.println("该式子能整除");
        }
    } 
    
    
    }
public static void output1()//整数计算不包括乘除
{
    double a=shuzi();
    double b=shuzi();
    
      Random random=new Random();
      int f=random.nextInt(2); 
        if(f==0)
        {
            System.out.print(a);
            System.out.print(‘+‘);
            System.out.print(b);
            System.out.println("="+(a+b));
        }
        if(f==1)
        {
            System.out.print(a);
            System.out.print(‘-‘);
            System.out.print(b);
            System.out.println("="+(a-b));
            if(a-b<0)
            {           
                System.out.println("此次计算式式子结果为负数。");
            }
        } 
}

}