四则运算level2

package j;

import java.util.Scanner;

public class Main {

    public static void main(String[] args) {

            Scanner in=new Scanner (System.in);

            System.out.println("题目的数量");

                

            int number=in.nextInt();

            System.out.println("数值范围   10 空格 200 ");//先考虑整数的

            int up,down;

            down=in.nextInt();

            up=in.nextInt();

            

            System.out.println("打印时每行的间隔");

            int between;

            between=in.nextInt();            

            System.out.println("是否有乘除法Y/N");

        

            String jud1,jud2,jud3;

            jud1=in.next();

            System.out.println("是否支持小数Y/N");

            jud2=in.next();            

            System.out.println("加减有无负数Y/N");    

            jud3=in.next();

    

            do{

                int flag=2;    //算式长度

                int shuzi;        

                float shuzi2;//数字

                int signal=0;//数字符号            

                int b;        //运算符号        

                String Temp=new String("Y");

                flag =(int)(Math.random()*4)+2;//算式长度                                

                if(jud2.equalsIgnoreCase(Temp))//是否有小数点

                {

                    if(jud3.equalsIgnoreCase(Temp))//是否有负数

                        signal=(int) (Math.random()*2);

                                        

                    shuzi2=(float)(Math.random()*(up-down))+down;

                    shuzi2=(int)(shuzi2*1000);

                    shuzi2=shuzi2/1000;

                    if(signal<1)

                        System.out.print(shuzi2);

                    else

                        System.out.print("(-"+shuzi2+")");

                }                

                else{

                    if(jud3.equalsIgnoreCase(Temp))

                        signal=(int) (Math.random()*2);

                    

                 shuzi=(int)(Math.random()*(up-down)+down);

                 if(signal<1)

                        System.out.print(shuzi);

                    else

                        System.out.print("(-"+shuzi+")");    

                    

                }

                    //以上是第一个数                    

                do{

                    if(jud1.equalsIgnoreCase(Temp))//是否有乘除

                    b=(int)(Math.random()*4+1);

                    else

                        b=(int)(Math.random()*2+1);                    

                switch(b){    

                case 1://加                    

                    if(jud2.equalsIgnoreCase(Temp))//是否小数点

                    {

                        if(jud3.equalsIgnoreCase(Temp))//是否有负数

                            signal=(int) (Math.random()*2);

                        

                        shuzi2=(float)(Math.random()*(up-down))+down;

                        shuzi2=(int)(shuzi2*1000);

                        shuzi2=shuzi2/1000;

                         if(signal<1)

                             System.out.print("+"+shuzi2);    

                            else                    

                                System.out.print("+"+"(-"+shuzi2+")");    

                    }

                    else{



                        if(jud3.equalsIgnoreCase(Temp))//是否有负数

                            signal=(int) (Math.random()*2);

                        

                     shuzi=(int)(Math.random()*(up-down)+down);

                     if(signal<1)

                         System.out.print("+"+shuzi);    

                        else                    

                            System.out.print("+"+"(-"+shuzi+")");                    

                    }                        

                    break;

                case 2://减

                    if(jud2.equalsIgnoreCase(Temp))

                    {

                        if(jud3.equalsIgnoreCase(Temp))//是否有负数

                            signal=(int) (Math.random()*2);

                        

                        shuzi2=(float)(Math.random()*(up-down))+down;

                        shuzi2=(int)(shuzi2*1000);

                        shuzi2=shuzi2/1000;

                         if(signal<1)

                             System.out.print("-"+shuzi2);    

                            else                    

                                System.out.print("-"+"(-"+shuzi2+")");                            

                    }

                    else{

                        if(jud3.equalsIgnoreCase(Temp))//是否有负数

                        signal=(int) (Math.random()*2);

                        

                     shuzi=(int)(Math.random()*(up-down)+down);

                     if(signal<1)

                         System.out.print("-"+shuzi);

                        else                    

                            System.out.print("-"+"(-"+shuzi+")");                                 

                    }

                    break;

                case 3://乘

                    if(jud2.equalsIgnoreCase(Temp))

                    {

                        if(jud3.equalsIgnoreCase(Temp))//是否有负数

                            signal=(int) (Math.random()*2);

                        

                        shuzi2=(float)(Math.random()*(up-down))+down;

                        shuzi2=(int)(shuzi2*1000);

                        shuzi2=shuzi2/1000;

                         if(signal<1)

                             System.out.print("*"+shuzi2);    

                            else                    

                                System.out.print("*"+"(-"+shuzi2+")");                    

                    }

                    else{

                        if(jud3.equalsIgnoreCase(Temp))//是否有负数

                            signal=(int) (Math.random()*2);

                     shuzi=(int)(Math.random()*(up-down)+down);

                     if(signal<1)

                         System.out.print("*"+shuzi);    

                        else                    

                            System.out.print("*"+"(-"+shuzi+")");                    

                    }

                    break;

                case 4://除

                    if(jud2.equalsIgnoreCase(Temp))

                    {

                        if(jud3.equalsIgnoreCase(Temp))//是否有负数

                            signal=(int) (Math.random()*2);

                        

                        shuzi2=(float)(Math.random()*(up-down))+down;

                        shuzi2=(int)(shuzi2*1000);

                        shuzi2=shuzi2/1000;

                         if(signal<1)

                             System.out.print("/"+shuzi2);

                            else                    

                                System.out.print("/"+"(-"+shuzi2+")");                            

                    }

                    else{

                        if(jud3.equalsIgnoreCase(Temp))//是否有负数

                            signal=(int) (Math.random()*2);

                        

                     shuzi=(int)(Math.random()*(up-down)+down);

                     if(signal<1)

                         System.out.print("/"+shuzi);    

                        else                    

                            System.out.print("/"+"(-"+shuzi+")");                         

                    }

                    break;    

                }

                flag--;

                }while(flag>0);

                    System.out.print("=");

                number--;

                for(int k=1;k<=between;k++)

                System.out.println();

                }while(number>0);            

            }

            }





        

        

    

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做了n个简单的功能，但是括号君没头绪，所以卡代码了。小小的升级了一下----

求指点……