C#中最大的5个数字只有If/else

Question

虽然做一些C#练习却陷入了这个问题.

//仅使用五个 if语句查找五个数字中的最大数字.

我无法理解如何制作,所以我在线查看我设置了这个.

    Console.Write("Type number 1:");    double a = double.Parse(Console.ReadLine());
    Console.Write("Type number 2:");    double b = double.Parse(Console.ReadLine());
    Console.Write("Type number 3:");    double c = double.Parse(Console.ReadLine());
    Console.Write("Type number 4:");    double d = double.Parse(Console.ReadLine());
    Console.Write("Type number 5:");    double e = double.Parse(Console.ReadLine());

    double max;
    if (a > b && a > c && a > d && a > e)
    {
        max = a;
        Console.WriteLine("The biggest number from {0} , {1} and {2} is {3}.", a, b, c, max);
    }
    else if (b > a && b > c && b > d && b > e)
    {
        max = b;
        Console.WriteLine("The biggest number from {0} , {1} and {2} is {3}.", a, b, c, max);
    }
    else if (c > a && c > b && c > d && c > e)
    {
        max = c;
        Console.WriteLine("The biggest number from {0} , {1} and {2} is {3}.", a, b, c, max);
    }
    else if (d > a && d > b && d > c && d > e)
    {
        max = d;
        Console.WriteLine("The biggest number from {0} , {1} and {2} is {3}.", a, b, c, max);
    }
    else
    {
        max = e;
        Console.WriteLine("The biggest number from {0} , {1} and {2} is {3}.", a, b, c, max);
    }

使用练习示例,它返回正确的数据.例如

5   2   2   4   1   return: 5

但在进一步测试后,我最终认为这是错误的:

-1  -2  -2  -1  -15 return: -15

要么我的一年级数学技能错误,要么-15不大于-1.我知道错误在哪里,但我不知道如何实际修复它.

Answer 1

即使只有4个if也很容易.

double max = a;
if (b > max) max = b;
if (c > max) max = c;
if (d > max) max = d;
if (e > max) max = e;

Console.WriteLine("max is " + max);