namespace _022_使用if_else_if_else语句做多条件判断 {
class Program {
static void Main(string[] args) {
Console.WriteLine("您考了多少分?");
string str = Console.ReadLine();
int score = Convert.ToInt32(str);
if (score >= 90)
{
Console.WriteLine("优秀");
}else if (score >= 80 && score <= 89)
{
Console.WriteLine("良");
}else if (score >= 60 && score <= 79)
{
Console.WriteLine("中");
}
else
{
Console.WriteLine("差，继续努力哦！");
}
Console.ReadKey();
}
}
}
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