软件工程个人作业02

import java.util.Scanner;

public class Arithmetic {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        System.out.println("请输入题目的数量：");
        Scanner sc1 = new Scanner(System.in);
        int quantity = sc1.nextInt();
        System.out.println("请输入每行输出几道题目：");
        Scanner sc2 = new Scanner(System.in);
        int num = sc2.nextInt();
        int size=quantity;
        String[]suanshizu=new String[size];
        equation(quantity,suanshizu);
        output(suanshizu,num,quantity);
    }
    static void equation(int quantity,String a[])
    {
        System.out.println("请输入数值范围的最大值：");
        Scanner sc1 = new Scanner(System.in);
        int max = sc1.nextInt();
        System.out.println("请输入数值范围的最小值：");
        Scanner sc2 = new Scanner(System.in);
        int min = sc2.nextInt();
        System.out.println("请选择是否有负数（是：1   否：0）");
        Scanner sc3 = new Scanner(System.in);
        int x = sc3.nextInt();
        int iffu=x;
        System.out.println("请选择是否有分数（是：1   否：0）");
        Scanner sc4 = new Scanner(System.in);
        int y = sc4.nextInt();
        int iffen=y;
        System.out.println("请选择是否有乘除法（是：1   否：0）");
        Scanner sc5 = new Scanner(System.in);
        int z = sc5.nextInt();
        int ifcheng=z;
        System.out.println("请选择除法是否有余数（是：1   否：0）");
        Scanner sc6 = new Scanner(System.in);
        int ifyu = sc6.nextInt();
        for(int i=0;i<quantity;)
        {
            String suanshi;
            int c=1+(int)(Math.random()*7);
            suanshi=randomNumber(max,min,iffu,iffen);
            for(int t=0;t<c;t++)
            {
                if(x==1)
                    iffu=(int)(Math.random()*2);
                if(y==1)
                    iffen=(int)(Math.random()*2);
                if(z==1)
                    ifcheng=(int)(Math.random()*2);
                int n0=(int)(Math.random()*2);
                if(n0==0)
                {
                    suanshi=suanshi+randoSymbol(ifcheng,max,ifyu);
                    suanshi=suanshi+randomNumber(max,min,iffu,iffen);
                }
                if(n0==1)
                {
                    suanshi=randoSymbol(ifcheng,max,ifyu)+suanshi;
                    suanshi=randomNumber(max,min,iffu,iffen)+suanshi;
                }
                int n=(int)(Math.random()*3);
                if(n==2)
                {suanshi=‘[‘+suanshi+‘]‘;}
                }
            i=i+ti(a,suanshi,i);
        }
    }
    static String randomNumber(int max,int min,int iffu,int iffen)
    {
        String number;
        if(iffen==0)
            {
            int a=(int)(Math.random()*max);
            number=String.valueOf(a);
            }
        else
        {
            int a=(int)(Math.random()*max);
            int b=(int)(Math.random()*max);
            if(b<a)
            {
            int t=b;
            b=a;
            a=t;
            }
        for(int i=a;i>1;i--)
        {
            if(a%i==0&&b%i==0)
            {
                a=a/i;
                b=b/i;
            }
        }
            number=‘(‘+String.valueOf(a)+‘/‘+String.valueOf(b)+‘)‘;
        }
        if(iffu==1)
            number=‘(‘+"-"+number+‘)‘;
        return number;
    }
    static String randoSymbol(int ifcheng,int max,int ifyu)
    {
        String symbol;
        int a=1+(int)(Math.random()*4);
        symbol=String.valueOf(a);
        if(ifcheng==0)
        {
            if(a==1||a==2)
            {
                char s=‘+‘;
                symbol=String.valueOf(s);
            }
            if(a==3||a==4)
            {
                char s=‘-‘;
                symbol=String.valueOf(s);
            }
        }
        if(ifcheng==1)
        {
            if(a==1)
            {
                char s=‘+‘;
                symbol=String.valueOf(s);
            }
            if(a==2)
            {
                char s=‘-‘;
                symbol=String.valueOf(s);
            }
            if(a==3)
            {
                char s=‘ב;
                symbol=String.valueOf(s);
            }
            if(a==4)
            {
                int number1,number2;
                char s=‘÷‘;
                symbol=String.valueOf(s);
                if(ifyu==0)
                {for(;;)
                {
                    number1=1+(int)(Math.random()*max);
                    number2=2+(int)(Math.random()*max);
                    if(number1%number2==0)
                        break;
                }
                String num1=String.valueOf(number1);
                String num2=String.valueOf(number2);
                symbol=randoSymbol(0,max,ifyu)+num1+symbol+num2+randoSymbol(0,max,ifyu);
                }
            }
        }
        return symbol;
    }
    static void output(String a[],int num,int quantity)
    {
        for(int i=0;i<quantity;i++)
        {
            if((i+1)%num==0)
                System.out.println(a[i]+‘=‘);
            else
                System.out.print(a[i]+‘=‘+‘\t‘+‘\t‘);
        }
    }
    static int ti(String a[],String v,int i)
    {
        
        int j;
        if(i!=0)
        {
            for(j=0;j<i;j++)
                {
                    if(a[j]==v)
                    {
                        break;
                    }
                }
            if(j==i)
            {
                a[i]=v;
                return 1;
                }
            else
                return 0;
            
        }
        else
        {
            a[0]=v;
            return 1;
        }
    }
    }