【C#怎么比较三个数的大小并按从大到小的顺序输出?要用if语句.】

问题补充：

C#怎么比较三个数的大小并按从大到小的顺序输出?要用if语句.

答案：

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

namespace ConsoleApplication1

{ class Program

{ static void Main(string[] args)

{ Console.WriteLine(请输入三个数：);

double a = Convert.ToDouble (Console .ReadLine ());

double b = Convert.ToDouble(Console.ReadLine());

double c = Convert.ToDouble(Console.ReadLine());

double ? max=null ;

double ? middle =null ;

double ? min=null ;

if (a >= b && b >= c) {max = a;

middle = b;

min = c;

} elseif(a>=c&&c>=b){ max = a;

middle = c;

min = b;

}else if (b >= a && a >= c) { max = b;

middle = a;

min = c;

} elseif (b >= c && c >= a) { max = b;

middle = c;

min = a;

} else if (c>= a && a >= b) { max = c;

middle = a;

min = b;

}