1
2 //要求用户输入用户名密码，用户名只要不是admin密码不是888888提示失败
3 string name = "";
4 string mi = "";
5 while (name != "admin" || mi != "888888")
6 {
7 Console.WriteLine("请输入用户名");
8 name = Console.ReadLine();
9 Console.WriteLine("请输入密码");
10 mi = Console.ReadLine();
11 }
12 Console.WriteLine("登录成功");
13 Console.ReadKey();
1 //输入班级人数，然后依次输入学员成绩，计算班级学员的平均成绩和总成绩
2 Console.WriteLine("输入班级人数");
3 int renshu = Convert.ToInt32(Console.ReadLine());
4 int i = 1;
5 int zong = 0;
6 while (i <= renshu)
7 {
8 Console.WriteLine("请输入第{0}个学员的成绩",i);
9 int fenshu= Convert.ToInt32(Console.ReadLine());
10 zong += fenshu;
11 i++;
12 }
13 Console.WriteLine("{0}个人的班级总成绩是{1}，平均成绩是{2}", renshu, zong, zong / renshu);
14 Console.ReadKey();
1 string huida = "";
2 do
3 {
4 Console.WriteLine("老师我唱的可以吗");
5 huida = Console.ReadLine();
6 } while (huida=="no");
7 Console.WriteLine("可以");
8 Console.ReadKey();
9
