using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

namespace if语句

{

    class Program

    {

        static void Main(string[] args)

        {

             //如果张三的考试成绩大于90,那么爸爸奖励他100块钱。


            Console.WriteLine("请输入张三的成绩");

            int cj = Convert.ToInt32(Console.ReadLine());

            if (cj > 90)

            {

            /   Console.WriteLine("爸爸奖励100元");

            }

            else

            {

              Console.WriteLine("爸爸让写总结");

            }

            Console.ReadKey();

               //2如果张三的语文成绩大于90并且音乐成绩大于80,或者语文成绩等于100并且音乐成绩大于70,则奖励100元。

           Console.WriteLine("请输入张三的语文成绩");

           int chinese = Convert.ToInt32(Console.ReadLine());

           Console.WriteLine("请输入张三的音乐成绩");

           int yinyue = Convert.ToInt32(Console.ReadLine());

           bool cj; 

            if (cj = chinese > 90 && yinyue > 80 || chinese == 100 && yinyue > 70)

            {

                Console.WriteLine("爸爸奖励100元");

            }

            Console.ReadKey();

            ///3对结业考试成绩测评(要求用户输入一个具体成绩0-100分,程序根据成绩显示一个等级)

            (考虑用if还是用if-else)

             成绩>=90   A

            90> 成绩>=80   B

            80> 成绩>=70   C

            70> 成绩>=60   D

           成绩<60   E

            Console.WriteLine("请您输入一个具体的成绩");

            int cj = Convert.ToInt32(Console.ReadLine());

            if (cj >= 90)

          {

                Console.WriteLine("A");

            }

       if (cj < 90 && cj >= 80)

          {

                Console.WriteLine("B");

            }

            if (cj < 80 && cj >= 70)

            {

                Console.WriteLine("C");

            }

            if (cj < 70 && cj >= 60)

            {

               Console.WriteLine("D");

            }

            if  (cj<60)

            {

              Console.WriteLine("E");

            }

            Console.ReadKey();

            ///4.要求用户输入两个数a和b,如果a能够被b整除或者a加b大于100,则输出a否则输出b。

            Console.WriteLine("请您输入一个数字");

            int a = Convert.ToInt32(Console.ReadLine());

            Console.WriteLine("请您输入一个数字");

            int b = Convert.ToInt32(Console.ReadLine());

            if (a % b == 0 || a + b > 100)

            {c

               Console.WriteLine("a");

            }

            else

            {

                Console.WriteLine("b");

            }

            Console.ReadKey();

//6.让用户输入用户名和密码,如果用户名为admin,密码为mypass,则提示登录成功。

            Console.WriteLine("请您输入密码:");

            int password = Convert.ToInt32(Console.ReadLine());

         

           

                if (password == 888888)

                {

                    Console.WriteLine("正确");

                }

                 if (password != 888888)

                {

                    Console.WriteLine("请您重新输入");

                }

                 if (password == 888888)

                {

                     Console.WriteLine("正确");

                 }

           

              Console.ReadKey();

        }

    }

}

 


c#基础练习之if结构_用户名