import java.util.Random;import java.util.Scanner;class Suan1{    public int x,y,c;    public Random random=new Random();    String m;    public String shengcheng()    {                 c=random.nextInt(4);         String fuhao;         x=random.nextInt(100);         y=random.nextInt(100);         if(c==0)         {             fuhao="+";         }         else if(c==1)         {             fuhao="-";         }         else if(c==2)         {             fuhao="*";         }         else         {             fuhao="/";         }         m=String.valueOf(x)+fuhao+String.valueOf(y);         return m;             }    public void shuchu()    {        if(c==0)        {            System.out.println(x+"+"+y+"=");        }        else if(c==1)        {            if(x>=y)            System.out.println(x+"-"+y+"=");            else                System.out.println(y+"-"+x+"=");        }        else if(c==2)        {            if(x*y<100)            {                System.out.println(x+"*"+y+"=");            }            else            {                for(int i=0;;i++)                {                    if(x*y<=100)                    {                        System.out.println(x+"*"+y+"=");                        break;                    }                    else                    {                        y=random.nextInt(100);                    }                                }            }        }        else if(c==3)        {            for(int i=0;;i++)            {            if(y==0)            {                y=random.nextInt();            }            else            {                break;            }            }                System.out.println(x*y+"/"+y+"=");                        }    }    public int jianyan(String a[],int s)    {       int flag=1;       for(int i=0;i
      
       y&&m>n)            {            System.out.println(y+"/"+x+"  +  "+n+"/"+m+"=");            }            else if(x>y&&m