using System;
using System.Collections.Generic;
using System.Text;

namespace Chapter32
{
    class Program
    {
        static void Main(string[] args)
        {
            //int i = (int)Direction.East;
            //int j = (int)Direction.West;
            //string s = Direction.East.ToString();
            //Console.WriteLine(i);
            //Console.WriteLine(j);
            //Console.WriteLine(s);

            //string [] StringArray = { "小朱", "小張", "小王" };
            //int [] IntArray = {10,20,30,40};

            //Console.WriteLine(StringArray[0]);
            //Console.WriteLine(StringArray[1]);
            //Console.WriteLine(StringArray[2]);

            //int a = 10;
            //Console.WriteLine(a++);
            //Console.WriteLine(++a);
            //Console.WriteLine(a--);
            //Console.WriteLine(--a);

            //int i = 5;
            //int j = 6;
            //i += j;
            //j = i - j;
            //i -= j;
            //Console.WriteLine("i="+i+",j="+j);

            //int i = 3;
            //int j = 4;
            //Console.WriteLine(i == j);
            //Console.WriteLine(i != j);
            //Console.WriteLine(i > j);
            //Console.WriteLine(i < j);
            //Console.WriteLine(i >= j);
            //Console.WriteLine(i <= j);

            //int i = 3;
            //int j = 4;
            //Console.WriteLine(i >= 3 && j <= 3);
            //Console.WriteLine(i != 3 || j == 4);

            //int iNum1 = int.Parse(Console.ReadLine());
            //int iNum2 = int.Parse(Console.ReadLine());
            //int iResult = int.Parse(Console.ReadLine());
            //Console.WriteLine(iNum1 + iNum2 == iResult ? "正確":"錯誤");

            Random rnd = new Random();
            int iNum1 = rnd.Next(10);
            int iNum2 = rnd.Next(10);
            int iOper = rnd.Next(4);
            string [] arrOper = { "+", "-", "*", "/" };
            Console.Write(iNum1 +" "+arrOper[iOper]+" "+iNum2+" = ");
            int iResult = int.Parse(Console.ReadLine());
            iNum1 += iOper == 0 ? iNum2 : 0;
            iNum1 -= iOper == 1 ? iNum2 : 0;
            iNum1 *= iOper == 2 ? iNum2 : 1;
            iNum1 /= iOper == 3 ? iNum2 : 1;
            Console.WriteLine(iNum1 == iResult ? "答案正確" : "答案錯誤，正確答案為 " + iNum1 + " ");

        }
    }

    enum Direction
    {
        North,
        South,
        East,
        West
    }
}