import java.util.*;
public class yunsuan {
    public static Scanner in=new Scanner(System.in);
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        int s;
        while(true)
        {
            System.out.println("请输入要进行的运算：");
            System.out.println("1.整数四则运算：");
            System.out.println("2.真分数四则运算：");
            System.out.println("3.退出：");
            s=in.nextInt();
            if(s==1)
            {
                System.out.println("请输入要生成题目的个数：");
                int n=in.nextInt();
                System.out.println("请输入数值范围：");
                int p=in.nextInt();
                int q=in.nextInt();
                System.out.println("是否有括号？ 1:有 2:否");
                int k=in.nextInt();
                if(k==1)
                {
                    parentheses(n,p,q);
                }
                else
                {
                    IntYuan(n,p,q);
                }
                continue;
            }
            if(s==2)
            {
                System.out.println("请输入要生成题目的个数：");
                int m=in.nextInt();
                for(int j=0;j<m;j++)
                {
                TrueNum();
                }
                continue;
            }
            if(s==3)
            {
                break;
            }
            else
            {
                System.out.println("输入错误，请重新输入：");
                s=in.nextInt();
            }
        }
        in.close();
    }
    public static void IntYuan(int n,int p,int q)
    {
        int a1=0;
        int a2=0;
        int result1;
        char ch;
        System.out.print("是否有乘除法？ 1:有 2:否");
        int c=in.nextInt();
        System.out.print("加减有无负数？ 1:有 2:否");
        int f=in.nextInt();
        System.out.print("除法有无余数？ 1:有 2:否");
        int y=in.nextInt();
        for(int i=0;i<n;i++) 
        {
            a1=ranNum(a1,p,q);
            a2=ranNum(a2,p,q);
            if(c==1)
            {
                ch=ranChar1();
            }
            else
            {
                ch=ranChar2();
            }
            //当加减不能出现负数时执行此操作
            if(f==2 &&((a1<0||a2<0)||(a1<a2 && ch==‘-‘)))
            {
                i--;
            }
            //当除法不能有余数时执行此操作
            else if(y==2 && ch==‘/‘ && a1%a2!=0)
            {
                i--;
            }
            else
            {
                System.out.print(a1);
                System.out.print(ch);
                System.out.println(a2+"=");
                System.out.print("请输入答案：");
                result1=in.nextInt();
                if(ch==‘+‘&&(result1==a1+a2))
                {
                    
                    System.out.println("计算正确！");
                }
                else if(ch==‘-‘&&(result1==a1-a2))
                {
                    System.out.println("计算正确！");
                }
                else if(ch==‘*‘&&(result1==a1*a2))
                {
                    System.out.println("计算正确！");
                }
                else if(ch==‘/‘&&(result1==a1/a2))
                {
                    System.out.println("计算正确！");
                }
                else
                {
                    System.out.println("计算错误！");
                }
            }
         }
    }
    public static void parentheses(int n,int p,int q)//带括号运算
    {
        int num=(int)(Math.random()*11+2);
        int[] a={0,0,0,0,0,0,0,0,0,0};
        for(int i=0;i<n;i++)
        {
            int a1=0;
            a1=ranNum(a1,p,q);
            System.out.print(a1);
            System.out.print(ranChar1()+"(");
            for(int j=0;j<num-4;j++)
            {
                System.out.print(ranNum(a[j],p,q));
                System.out.print(ranChar1());
            }
            System.out.println(ranNum(a[num-3],p,q)+")=");
        }
    }
    public static int ranNum(int a,int b,int c)
    {
        a=(int)(Math.random()*(c-b+1)+b);//随机数值范围为从b到c
        return a;
    }
    public static char ranChar1()
    {
        char[] b={‘+‘,‘-‘,‘*‘,‘/‘};
        int c=(int)(Math.random()*4);
        return b[c];
    }
    public static char ranChar2()
    {
        char[] b={‘+‘,‘-‘};
        int c=(int)(Math.random()*2);
        return b[c];
    }
    public static void TrueNum()
    {
        int b1,b2,b3,b4;
        b1=(int)(Math.random()*100);
        b2=(int)(Math.random()*100);
        b3=(int)(Math.random()*100);
        b4=(int)(Math.random()*100);
        yuefen(b1,b2);
        yuefen(b3,b4);
            if(b1<b2 && b3<b4)
            {
                System.out.print(b1+"/"+b2);
                System.out.print(ranChar1());
                System.out.println(b3+"/"+b4+"=");
            }
            else
            {
                TrueNum();
            }
    }
    public static void yuefen(int a1,int a2)
    {
        int min=Math.abs(a1)<Math.abs(a2)?Math.abs(a1):Math.abs(a2);
        int yueshu=1;
        for(int i=min;i>=1;i++)
        {
            if(a1/i==0 && a2/i==0)
            {
                yueshu=i;
                break;
            }
        }
        a1/=yueshu;
        a2/=yueshu;
    }
}