C#编程（3_流程控制）

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("Please Enter an integer:");
            int myInt=Convert.ToInt32(Console.ReadLine());
            bool isLessThan10 = myInt < 10;
            bool isBetweenThan0And5 = (myInt >= 0) && (myInt <= 5);
            Console.WriteLine("Integer is less than 10?{0}",isLessThan10);
            Console.WriteLine("Integer between 0 and 5?{0}",isBetweenThan0And5);
            Console.WriteLine("Exactly one of the above is true?{0}",isLessThan10^isBetweenThan0And5);//对两个变量执行逻辑异或操作
            Console.ReadKey();


        }
    }
}

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            string comparison;
            Console.WriteLine("Enter a number:");
            double var1 = Convert.ToDouble(Console.ReadLine());
            Console.WriteLine("Enter anther number:");
            double var2 = Convert.ToDouble(Console.ReadLine());
            if (var1 < var2)
                comparison = "less than";
            else
            {
                if (var1 == var2)
                    comparison = "equal to";
                else
                    comparison = "greater than";
            }
            Console.WriteLine("The frist number is {0} the second number.",comparison);
            Console.ReadKey();

        }
    }

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            const string myName = "karli";
            const string sexyName = "angelina";
            const string sillyName = "ploppy";
            string name;
            Console.WriteLine("What is you name?");
            name = Console.ReadLine();
            switch (name.ToLower())//name.ToLower()是一个标准命令，用于处理所有输入的字符串，使输入的字符串与与给定字符串匹配。
            { 
                case myName:
                    Console.WriteLine("You have the same name with me!");
                    break;
                case sexyName:
                    Console.WriteLine("my,What a sexy name you have!");
                    break;
                case sillyName:
                    Console.WriteLine("That‘s a very ploppy name.");
                    break;
            }
            Console.WriteLine("Hello {0}!",name);
            Console.ReadKey();
        }
    }
}

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            //代码利用固定的利率，对年度计算余额的过程重复必要的次数，知道满足临界条件为止，在每次循环中，递增一个计数器变量，就可以确定需要多少年：
            double balance, interestRate, targerBalance;
            Console.WriteLine("What is your current balance?");
            balance = Convert.ToDouble(Console.ReadLine());
            Console.WriteLine("What is your current annual interest rate(in %)?");
            interestRate = 1 + Convert.ToDouble(Console.ReadLine())/100.0;
            Console.WriteLine("What balance would you like to have?");
            targerBalance = Convert.ToDouble(Console.ReadLine());
            int totalYears = 0;
            do
            {
                balance *= interestRate;
                ++totalYears;
            }
            while (balance < targerBalance);
            Console.WriteLine("In {0} year {1} you‘ll have the blance of {2}.",totalYears,totalYears==1?"":"s",balance);//三元运算符
            Console.ReadKey();
        }
    }
}

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            double balance, interestRate, targerBalance;
            Console.WriteLine("What is your current balance?");
            balance = Convert.ToDouble(Console.ReadLine());
            Console.WriteLine("What is your current annual interest rate(in %)?");
            interestRate = 1 + Convert.ToDouble(Console.ReadLine()) / 100.0;
            Console.WriteLine("What balance would you like to have?");
            targerBalance = Convert.ToDouble(Console.ReadLine());
            int totalYears = 0;
            while (balance < targerBalance)
            {
                balance *= interestRate;
                ++totalYears;
            }
            Console.WriteLine("In {0} year {1} you‘ll have the blance of {2}.", totalYears, totalYears == 1 ? "" : "s", balance);//三元
            if (totalYears == 0)
                Console.WriteLine("To be honest,you realy didn‘t need to use this calculator.");
            Console.ReadKey();
        }
    }
}

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            //（Mandelbrot）曼德布洛特集合
            double realCoord, imagCoord;
            double realTemp, imagTemp, realTemp2, arg;
            int iterations;
            for (imagCoord = 1.2; imagCoord >= -1.2; imagCoord -= 0.05)
            {
                for (realCoord = -0.6; realCoord <= 1.77; realCoord += 0.03) 
                {
                    iterations = 0;
                    realTemp = realCoord;
                    imagTemp = imagCoord;
                    arg = (realCoord * realCoord) + (imagCoord * imagCoord);
                    while ((arg < 4) && (iterations < 40))
                    {
                        realTemp2 = (realTemp * realTemp) - (imagTemp * imagTemp) - realCoord;
                        imagTemp = (2 * realTemp * imagTemp) - imagCoord;
                        realTemp = realTemp2;
                        arg = (realTemp * realTemp) + (imagTemp * imagTemp);
                        iterations += 1;      
                    }
                    switch (iterations % 4)
                    { 
                case 0:
                    Console.Write(".");
                    break;
                case 1:
                    Console.Write("o");
                    break;
                case 2:
                    Console.Write("O");
                    break;
                case 3:
                    Console.Write("@");
                    break;
                    }
                }
            Console.Write("\n");
            } 
            Console.ReadKey();        
        }
    }
}

string resultString=(myInterger<10) ? "Less than 10":"Greater than or equal to 10";