判断成绩及格优良

依旧是if语句的简单练习

if嵌套，满足前提条件才能执行条件下的语句

 

namespace ConsoleApplication9
{class Program{static void Main(string[] args){while (true){Console.Write("请输入姓名：");Console.ReadLine();Console.Write("请输入分数：");double a = Convert.ToDouble(Console.ReadLine());if (a >= 60 && a < 100)//满足才执行下一个if{if (a >= 80){Console.WriteLine("你学习的不错，值得表扬！");}else{Console.WriteLine("恭喜你及格了");}}else if (a >= 50 && a < 60){Console.WriteLine("就差一点点，再加把劲！");}else{if (a < 50 && a > 0){Console.WriteLine("使劲努力，不要偷懒！");}else{Console.WriteLine("请输入正确的分数！");}}}}}
}