四则运算*3

package 四则运算2;

import java.util.Scanner;

public class Test {

    public static void main(String[] args) throws Exception {
        // TODO Auto-generated method stub
        
        Scanner in = new Scanner(System.in);
        System.out.println("请输入题目的数量：");
        int n = in.nextInt();
        System.out.println("请输入每行题目的数目：");
        int num= in.nextInt();
        //乘除法
        System.out.println("请输入题目是否包含乘除法：1、有     2、没有");
        int j = in.nextInt();
        int k;//控制运算符号的数目，k=2没有乘除，反之有乘除
        if(j==1)
        {
            k = 3;
        }
        else 
            k = 1;
        //是否有括号
        System.out.println("请输入题目是否包含括号：1、有     2、没有");
        int if_kuohao = in.nextInt();
        
        
        
        //控制数值范围
        System.out.println("请输入题目数值的最大范围：");
        int num_max = in.nextInt();
        System.out.println("请输入数值的最小范围：");
        int num_min = in.nextInt();
        System.out.println( "请输入加减结果是否允许有负数：1、有负数  2、没有负数");
        int ifFushu = in.nextInt();
        System.out.println( "请输入除法结果是否允许有余数(如：5/4= 1...1)：1、有余数  2、没有余数");
        int ifYushu = in.nextInt();
        yunsuan(in,n,num,k,num_max,num_min,ifFushu,ifYushu,if_kuohao);
        in.close();
    }
    //分数化简
    public static String huajian(int a,int b){
        if(a<b)
        {
            for(int i = a;i>0;i--){
            if(a%i==0&&b%i==0){
                a/=i;
                b/=i;
                break;
            }}
            if(a%b==0)
                return a/b+"";
            else
                return a+"/"+b;
        }
        else{

            for(int i = b;i>0;i--){
            if(a%i==0&&b%i==0){
                a/=i;
                b/=i;
                break;
            }}
            if(b%a==a)
                return b/a+"";
            else
                return b+"/"+a;
            }
        
        
    }
    public static String yushu(int a,int b){
        if(a%b==0)
            return a/b+"";
        else if(b%a==a)
            return b/a+"";
        else
            return a/b+"..."+a%b;
    }
    public static float opt(String s) throws Exception{
        if(s == null || "".equals(s.trim())) {
            return 0f;
        }
        int a1=s.indexOf("+");
        int a2=s.indexOf("-");
        int a3=s.indexOf("*");
        int a4=s.indexOf("/");
        int a5=s.indexOf("(");
        if(a1==-1&&a2==-1&&a3==-1&&a4==-1){
            if(s.trim()==null||"".equals(s.trim())){
                throw new Exception("operate error");
            }
            return Float.parseFloat(s.trim());
        }
         
        if(a5!=-1){
        int a6=s.indexOf(")");
            if(a6==-1){
                throw new Exception("括号不匹配");
            }else{
                float f=opt(s.substring(a5+1,a6).trim());
                s=s.replace(s.substring(a5,a6+1), String.valueOf(f));
                return opt(s);
            }
        }
         
        if(a1!=-1){
            return opt(s.substring(0,a1))+opt(s.substring(a1+1,s.length()));
        }
        if(a2!=-1){
            return opt(s.substring(0,a2))-opt(s.substring(a2+1,s.length()));
        }
        if(a3!=-1){
            return opt(s.substring(0,a3))*opt(s.substring(a3+1,s.length()));
        }
        if(a4!=-1){
            return opt(s.substring(0,a4))/opt(s.substring(a4+1,s.length()));
        }
        return Integer.parseInt(s.trim());
    }
    //n为数的个数，
    public static float kuohao(int n,int num_max,int num_min) throws Exception{
        int x=(int) (1+(Math.random()*num_max));
        while(x<num_min)
            x = (int)(1+(Math.random()*num_min));
        int y=0;//符号随机
        int j;//寻找（
        int p;//确定）的位置
        int e=0;//确定表达式中是否有右括号
        int a = 10;
        String f = null ;
        String biaodashi = x+"";
        int num = 8;
        for(int i = 0;i<5-1;i++){
            
            y = (int)(1+(Math.random()*num));
            
            if(y==1)
                f = "+";
            else if(y==2)
                f = "-";
            else if(y==3)
                f = "*";
            else if(y==4)
                f = "/";
            else if(y==5)
                f = "+(";
            else if(y==6)
                f = "-(";
            else if(y==7)
                f = "*(";
            else if(y==8)
                f = "/(";
            
            biaodashi = biaodashi+ f + x ;
            x=(int)(1+(Math.random()*20));
            //控制左括号
            if(y>4)
                {
                num = 4;
                a = i;
                }
            else if(4-i>0)
                num = 4;
            //控制右括号
            if(i-a>=1&&e==0)
                {
                p=(int)(1+(Math.random()*2));
                if(p==1)
                    biaodashi+="";
                else
                    {
                    biaodashi+=")";
                    e=1;
                    }
                }
            
            
        }
        for(int q = 0;q<biaodashi.length();q++){
            if(biaodashi.charAt(q)=='(')
                for(int w = q;w<biaodashi.length();w++)
                    if(biaodashi.charAt(w)==')')
                        break;
                    else
                        {
                        if(w==biaodashi.length()-1)
                            biaodashi+=")";
                        }
                            
            }
        
        System.out.print(biaodashi+"   ");
            float as = opt(biaodashi);
            return as;
            
        
        
    }
    //分数四则运算
    public static String[] fenshu(int n,int num,int num_max,int num_min,
            int fuhao_num,int ifYushu,int ifFushu){
        
        System.out.println("
分数四则运算：");
        String result1[] = new String[n];
        for(int i1 = 0;i1<n;i1++)
        {
            int a =1+ (int)(Math.random()*num_max);
            int b = 1+(int)(Math.random()*num_max);
            int c = 1+(int)(Math.random()*num_max);
            int d = 1+(int)(Math.random()*num_max);
            while(a<num_min){
                a=1+ (int)(Math.random()*num_max);
            }
            while(b<num_min){
                b=1+ (int)(Math.random()*num_max);
            }
            while(c<num_min){
                c=1+ (int)(Math.random()*num_max);
            }
            while(d<num_min){
                d=1+ (int)(Math.random()*num_max);
            }
            int e;
            int fuhao1 = 1+(int)(Math.random()*fuhao_num);
            
            if(a>b)
            {
                e = a;
                a = b;
                b = e;
            }
            if(c>d)
            {
                e = c;
                c = d;
                d = e;
            }
            String x1 = a+"/"+b;
            String y1 = c+"/"+d;
            
            
            System.out.print((i1+1+n)+": ");
            
            
            if(fuhao1 == 0&&ifYushu == 1){
                System.out.print(x1+ " + " +y1+"    ");
                a = a*d+b*c;
                b = b*d;
                
                result1[i1] = yushu(a,b);
            }
            else if(fuhao1 == 0&&ifYushu == 2)
            {
                System.out.print(x1+ " + " +y1+"    ");
                a = a*d+b*c;
                b = b*d;
                
                result1[i1] = huajian(a,b);
            }
            else if(fuhao1 == 1&&ifYushu==1)
            {
                //有负数
                if(ifFushu==1){
                    System.out.print(y1+ " - " +x1+"    ");
                    a = b*c-a*d;
                    b = b*d;
                    
                    result1[i1] = yushu(a,b);
                }
            }
                //没有负数
                if(ifFushu==2){
                if(a/b<c/d)
                {
                    System.out.print(y1+ " - " +x1+"    ");
                    a = b*c-a*d;
                    b = b*d;
                    
                    result1[i1] = yushu(a,b);
                }
                else
                {
                    System.out.print(x1+ " - " +y1+"    ");
                    a = a*d-b*c;
                    b = b*d;
                    result1[i1] = yushu(a,b);
                }
                
            }
            else if(fuhao1 == 1&&ifYushu==2)
            {
                //有负数
                if(ifFushu==1){
                    System.out.print(y1+ " - " +x1+"    ");
                    a = b*c-a*d;
                    b = b*d;
                    
                    result1[i1] = huajian(a,b);
                }
                //没有负数
                if(ifFushu==2){
                if(a/b<c/d)
                {
                    System.out.print(y1+ " - " +x1+"    ");
                    a = b*c-a*d;
                    b = b*d;
                    
                    result1[i1] = huajian(a,b);
                }
                else
                    System.out.print(x1+ " - " +y1+"    ");
                a = a*d-b*c;
                b = b*d;
                
                result1[i1] = huajian(a,b);}
            }
            else if(fuhao1 ==2&&ifYushu==1){
                System.out.print(x1+ " * " +y1+"    ");
                a = a*c;
                b = b*d;
                
                result1[i1] = yushu(a,b);
            }
            else if(fuhao1 ==2&&ifYushu==2){
                System.out.print(x1+ " * " +y1+"    ");
                a = a*c;
                b = b*d;
                
                result1[i1] = huajian(a,b);
            }
            else if(fuhao1 ==3&&ifYushu==1){
                System.out.print(x1+ " / " +y1+"    ");
                a = a*d;
                b = b*c;
                result1[i1] = yushu(a,b);
            }
            else if(fuhao1 ==3&&ifYushu==2){
                System.out.print(x1+ " / " +y1+"    ");
                a = a*d;
                b = b*c;
                result1[i1] = huajian(a,b);
            }    
            if((i1+1)%num==0)
                System.out.print("
");
        }
        return result1;
    }
    //四则运算 fuhao_num控制乘除，num_max num_min控制数值范围，c控制是否有负数，d控制是否有余数
    public static void yunsuan(Scanner in,int n,int num,int fuhao_num,
            int num_max,int num_min,int ifFushu,int ifYushu,int if_kuohao) throws Exception{
        
        int result[] = new int[n];
        String result1[] = new String[n];
        String aq[] = new String[n];
        
        if(if_kuohao==2){
            //整数四则运算
            System.out.println("整数四则运算：");
            for(int i  = 0;i<n/2;i++){
                //获得两个数
                int x =1+ (int)(Math.random()*num_max);
                int y = 1+(int)(Math.random()*num_max);
                while(x<num_min){
                    x =1+ (int)(Math.random()*num_max); 
                }
                while(y<num_min)
                {
                    y = 1+ (int)(Math.random()*num_max);
                }
                
                //随机获得符号
                int fuhao = 1+(int)(Math.random()*fuhao_num);
                System.out.print(i+1+": ");
                
                //加法运算
                if(fuhao == 0)
                {
                    System.out.print(x+ " + " +y+"    ");
                    
                    result[i] = x+y;
                }
                //减法运算并检验结果无负数
                else if(fuhao == 1&&ifFushu ==2)
                {
                    if(x<y)
                    {
                        System.out.print(y+ " - " +x+"    ");
                        
                        result[i] = y-x;
                    }
                    else
                    {
                        System.out.print(x+ " - " +y+"    ");
                        
                        result[i] = x-y;
                    }
                }
                //减法运算结果有负数
                else if(fuhao == 1&&ifFushu == 1)
                {
                    System.out.print(x+ " - " +y+"    ");
                    
                    result[i] = x-y;
                }
                //乘法运算
                else if(fuhao ==2){
                    System.out.print(x+ " * " +y+"    ");
                    
                    result[i] = x*y;
                }
                
                //除法运算并判断结果有无余数
                else
                {
                if(ifYushu == 2){
                    System.out.print(x+ " / " +y+"    ");
                    
                    result1[i] = huajian(x,y);
                }
                else
                {
                    System.out.print(x+ " / " +y+"    ");
                    
                    result1[i] = x/y+"..."+x%y;
                }
                
                
            }
                //判断每行的题数
                if((i+1)%num ==0)
                {
                    System.out.println();
                }
            }
                
                
            //分数四则运算
            aq=fenshu(n/2,num,num_max, num_min,fuhao_num, ifYushu, ifFushu);
            for(int j = n/2;j<n;j++){
                result1[j] = aq[j-n/2]; 
                
            }
            System.out.println("若做完，按1可查看答案");
            int number = in.nextInt();
            in.close();
            int a = 0;
            if(number == 1){
            for(int i1= 0;i1<n;i1++){
                System.out.print(i1+1+":");
                if(result1[i1]!=null){
                    System.out.print(result1[i1]+"   ");
                    }
                else
                    System.out.print(result[i1]+"   ");
                a++;
                if(a%5==0)
                    System.out.print("
");
            }
        }
            }
        //带括号的运算
        if(if_kuohao==1){
            System.out.println("
整数四则运算");
        for(int i  = 0;i<n/3;i++){
            //获得两个数
            int x =1+ (int)(Math.random()*num_max);
            int y = 1+(int)(Math.random()*num_max);
            while(x<num_min){
                x =1+ (int)(Math.random()*num_max); 
            }
            while(y<num_min)
            {
                y = 1+ (int)(Math.random()*num_max);
            }
            
            //随机获得符号
            int fuhao = 1+(int)(Math.random()*fuhao_num);
            System.out.print(i+1+": ");
            
            //加法运算
            if(fuhao == 0)
            {
                System.out.print(x+ " + " +y+"    ");
                
                result[i] = x+y;
            }
            //减法运算并检验结果无负数
            else if(fuhao == 1&&ifFushu ==2)
            {
                if(x<y)
                {
                    System.out.print(y+ " - " +x+"    ");
                    
                    result[i] = y-x;
                }
                else
                {
                    System.out.print(x+ " - " +y+"    ");
                    
                    result[i] = x-y;
                }
            }
            //减法运算结果有负数
            else if(fuhao == 1&&ifFushu == 1)
            {
                System.out.print(x+ " - " +y+"    ");
                
                result[i] = x-y;
            }
            //乘法运算
            else if(fuhao ==2){
                System.out.print(x+ " * " +y+"    ");
                
                result[i] = x*y;
            }
            
            //除法运算并判断结果有无余数
            else
            {
            if(ifYushu == 2){
                System.out.print(x+ " / " +y+"    ");
                
                result1[i] = huajian(x,y);
            }
            else
            {
                System.out.print(x+ " / " +y+"    ");
                
                result1[i] = x/y+"..."+x%y;
            }
            
            
        }
            //判断每行的题数
            if((i+1)%num ==0)
            {
                System.out.println();
            }
        }
            
            
        //分数四则运算
        aq=fenshu(n/3,num,num_max, num_min,fuhao_num, ifYushu, ifFushu);
        for(int j = n/3;j<n/3*2;j++){
            result1[j] = aq[j-n/3]; 
            
        }
        
        
        //括号四则运算
        float[] as = new float[n];
        System.out.println("
括号四则运算：");
        for(int i = n/3*2;i<n;i++){
            System.out.print(i+1+":");
            as[i] = kuohao(num,num_max,num_min);
            if(i%num==0)
                System.out.print("
");
            }
            
        System.out.println("若做完，按1可查看答案");
        int number1 = in.nextInt();
        in.close();
        int a1 = 0;
        if(number1 == 1){
        for(int i1= 0;i1<n;i1++){
            System.out.print(i1+1+":");
            if(result1[i1]!=null&&i1<n/3*2){
                System.out.print(result1[i1]+"   ");
                }
            else if(i1<n/3*2)
                System.out.print(result[i1]+"   ");
            else if(i1>=n/3*2)
                System.out.println(as[i1]);
            a1++;
            if(a1%5==0)
                System.out.print("
");
        }
        }
    

}
    }
    }