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时间:2016-06-20 08:56:55      阅读:218      评论:0      收藏:0      [点我收藏+]

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语言

语言是指程序的命令,都是按照顺序执行的。语言在程序中执行的顺序称之为“控制流”或“执行流”。

语句是可以镶嵌的,可以是以分号结尾的但行代码,也可以是语块中的但行语句。语句块括在括号{}内,并且可以包含镶嵌块。

语句分类:

选择语句:if    else    switch   case

循环语句: do   for   foreach   while

跳转语句: break   continue   default   return

异常语句:try-catch-finally

一、if  else

模式:

……if (条件)                          if,如果的意思后面判断条件,符合执行下面内容

……{内容(这里也可以镶嵌)}

……else                               不符合if的条件是,else开始执行

……{内容}

 

 

 

 

输入三个数,判断三个数的大小从小到大输出打印

            //Console.Write("请输入a=");

            //int x =int.Parse(Console.ReadLine());

            //Console.Write("请输入b=");

            //int y =int.Parse(Console.ReadLine());

            //Console.Write("请输入c=");

            //int z =int.Parse(Console.ReadLine());

            //if (x<y&&x<z)

            //{

            //    if(y<z)

            //        Console.WriteLine("从小到大依次是"+x+y+z);

            //    else if (y>z)

            //        Console.WriteLine("从小到大依次是" + x + z + y);

            //}

            //else if (y < x && y < z)

            //{

            //    if (x < z)

            //        Console.WriteLine("从小到大依次是" + y + x + z);

            //    else

            //        Console.WriteLine("从小到大依次是" + y + z + x);

            //}

            //else

            //{

            //    if (x < y)

            //        Console.WriteLine("从小到大依次是" + z + x + y);

            //    else

            //        Console.WriteLine("从小到大依次是" + z + y + x);

            //}

 

            //Console.ReadLine();

 

 

            //Console.Write("请输入姓名");

            //string name = Console.ReadLine();

            //Console.Write("请输入成绩");

            //double a = double.Parse(Console.ReadLine());

            //if (a <= 100 && a >= 50)

            //{

            //    if (a == 100)

            //        Console.WriteLine("恭喜你" + name + ",满分通过!");

            //    else if (a < 100 && a >= 80)

            //        Console.WriteLine("" + name + ",你很优秀,继续保持!");

            //    else if (a < 80 && a >= 60)

            //        Console.WriteLine("" + name + ",成绩良好");

            //    else if (a < 60)

            //        Console.WriteLine("" + name + ",就差一点点,下次一定要至少及格!");

            //}

            //else

            //{

            //    Console.WriteLine("" + name + ",你是笨蛋么?");

            //}

            //Console.ReadLine();

 

            //有一组函数:y = x (x<1);y = 2x -1  (1<=x<10); y = 3x-11  (x>=10)。括号内是x的满足条件。

            //实现功能,随意输入一个x值,输出y的值。

 

            //Console.Write("请输入x");

            //double x =double.Parse(Console.ReadLine());

            //if(x<1)

            //{

            //    double y = x;

            //    Console.WriteLine("y=" + y + "");

            //}

            //else if (x<10&&x>=1)  

            //{

            //    double y = 2 * x - 1;

            //Console.WriteLine("y=" + y + "");

            //}

            //else if (x>=10)

            //{

            //    double y = 3 * x - 11;

            //    Console.WriteLine("y=" + y + "");

            //}

            //Console.ReadLine();

            //输入整数a和b,若a2+b2大于100,则输出a2+b2百位以上数字,否则输出两数之和

            //Console.Write("请输入数字a");

            //int a = int.Parse(Console.ReadLine());

            //Console.Write("请输入b");

            //int b = int.Parse(Console.ReadLine());

            //int c = a * a + b * b;

            //if (c > 100)

            //{

            //    int d = c - 100;

            //    Console.WriteLine("y=" +d + "");

            //}

            //else

            //{

            //    int e = a + b;

            //    Console.WriteLine(e);

            //}

            //Console.ReadLine();

 

            //相亲过程:你有房子么?你有钱么?你有能力么?

            //【结婚吧】【先买房子在结婚】【先赚钱再买房子再结婚】都没有【拜拜~~】

                        //Console.Write("你有房子吗?");

            //string a = Console.ReadLine();

            //if (a == "有")

            //{

            //    Console.WriteLine("结婚吧");

            //}

            //else

            //{

            //Console.Write("你有钱么?");

            //    string b = Console.ReadLine();

            //    if(b=="有")

            //    {

            //    Console.WriteLine("先买房子在结婚");

            //    }

            //    else

            //    {

            //      Console.Write("你有能力么?");

            //    string c = Console.ReadLine();

            //    if(c=="有")

            //    {

            //     Console.WriteLine("先赚钱再买房子再结婚");

            //    }

            //      else

            //{

            //Console.WriteLine("拜拜~~");

            //}

            //    }

            //}

            //Console.ReadLine();

 

二元一次方程求解

△=b2-4ac,若小于0无解等于零一个解;大于0两个解

 

            //Console.WriteLine("求二元一次方程a*x*x+b*x+c=o的解");

            //Console.Write("请输入a");

            //int a = int.Parse(Console.ReadLine());

            //Console.Write("请输入b");

            //int b = int.Parse(Console.ReadLine());

            //Console.Write("请输入c");

            //int c = int.Parse(Console.ReadLine());

            //int d = b * b - 4 * a * c;

            //if (d < 0)

            //{

            //    Console.WriteLine("方乘没有解!");

            //}

            //else

            //{

            //    double x1 = (-b + Math.Sqrt(d)) / (2 * a);

            //    double x2 = (-b - Math.Sqrt(d)) / (2 * a);

            //    if (d == 0)

            //    {

            //        Console.WriteLine("方乘有一个解!");

            //        Console.WriteLine("x1=x2=" + x1);

            //    }

            //    else

            //    {

            //        Console.WriteLine("方乘有两个解!");

            //        Console.WriteLine("x1=" + x1);

            //        Console.WriteLine("x2="+x2);

            //    }

            //}

            //Console.ReadLine();

输入身高体重,判断是否正常

男性:体重-身高+100在±3之间

女性:体重-身高+110在±3之间

 

            // Console.Write("请输入性别:");

            // string sex = Console.ReadLine();

            // Console.Write("请输入身高:");

            //double h = double.Parse( Console.ReadLine());

            // Console.Write("请输入体重:");

            // double w = double.Parse(Console.ReadLine());

            // if (sex == "男")

            // {

            //     double a = w - h + 100;

            //     if (a < 3 && a > -3)

            //     {

            //         Console.WriteLine("您的体重是正常的");

            //     }

            //     else

            //     {

            //         Console.WriteLine("您的体重是不正常的");

            //     }

            // }

            // else

            // {

            //     double b = w - h + 110;

            //     if (b < 3 && b < -3)

            //     {

            //         Console.WriteLine("您的体重是正常的");

            //     }

            //     else

            //     {

            //         Console.WriteLine("您的体重是不正常的");

            //     }

            // }

            // Console.ReadLine();

 

输入日期,判断对错。

 

            Console.Write("请输入年份:");

            int n = int.Parse(Console.ReadLine());

            if (n < 9999 && n > 0)

            {

                Console.Write("请输入月份:");

                int m = int.Parse(Console.ReadLine());

                if (m < 13 && m > 0)

                {

                    Console.Write("请输入日期:");

                    int d = int.Parse(Console.ReadLine());

                    if (d < 32 && d > 0)

                    {

                        if (m == 1 || m == 3 || m == 5 || m == 7 || m == 8 || m == 10 || m == 12)

                        {

                            Console.WriteLine("您输入的日期是:" + n + m + d);

                        }

                        else

                        {

                            if (m == 4 || m == 6 || m == 9 || m == 11 && d < 31 && d > 0)

                            {

                                Console.WriteLine("您输入的日期是:" + n + m + d);

                            }

                            else

                            {

                                if (d < 29 && d > 0 && m == 2)

                                {

                                    Console.WriteLine("您输入的日期是:" + n + m + d);

                                }

                                else

                                {

                                    if (d < 30 && d > 0 && m == 2 && n % 4 == 0 && n % 100 != 0 || n % 400 == 0)

                                    {

                                        Console.WriteLine("您输入的日期是:" + n + m + d);

                                    }

                                    else

                                    {

                                        Console.WriteLine("您输入的日期有误!");

                                    }

                                }

                            }

                        }

                    }

                    else

                    {

                        Console.WriteLine("您输入的日期有误!");

                    }

                }

                else

                {

                    Console.WriteLine("您输入的月份有误!");

                }

            }

            else

            {

                Console.WriteLine("您输入的年份有误!");

            }

            Console.ReadLine();

 

程序语言

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原文地址:http://www.cnblogs.com/light3857/p/5599478.html

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