using System; namespace DecisionMaking { class Program { static void Main(string[] args) { /* 局部变量定义 */ char grade = 'B'; switch (grade) { case 'A': Console.WriteLine("很棒！"); break; case 'B': case 'C': Console.WriteLine("做得好"); break; case 'D': Console.WriteLine("您通过了"); break; case 'F': Console.WriteLine("最好再试一下"); break; default: Console.WriteLine("无效的成绩"); break; } Console.WriteLine("您的成绩是 {0}", grade); Console.ReadLine(); } } }