c# - 如何在 C# 中返回随机数 gen 的最大值和最小值

Question

Random number = new Random();
int n;

for (int counter = 0; counter < 100; counter++)
{
    n = number.Next(0,1000);
    Console.WriteLine(n);
}

我需要弄清楚如何返回随机数的范围、最大值和最小值。我不允许使用数组。您能否也解释一下您是如何得到答案的。

Answer 1

Random number = new Random();
int min = int.MaxValue,
    max = int.MinValue;

for (int counter = 0; counter < 100; counter++)
{
    int n = number.Next(0, 1000);
    Console.WriteLine(n);

    if (n < min)
        min = n;
    if (n > max)
        max = n;
}

int range = min - max + 1;
Console.WriteLine("Min = {0}, Max = {1}, Range = {2}", min, max, range);

Answer 2

你可以得到所有关于它的 OO 和 Linqy。首先，构建您的累加器类：

class Accumulator
{

  public Accumulator Add( int n )
  {
    min = min.HasValue && min.Value < n ? min.Value : n ;
    max = max.HasValue && max.Value > n ? max.Value : n ;
    return this ;
  }

  private int? min = null ;
  private int? max = null ;

  public int Min { get { return min.Value     ; } }
  public int Max { get { return max.Value     ; } }
  public int Range { get { return (Max-Min)+1 ; } }

  public override string  ToString()
  {
    return string.Format( "Min:{0}, Max:{1}, Range:{2}" , Min , Max , Range ) ;
  }

}

然后是一个简单的咒语：

Random random = new Random() ;
Accumulator summary = Enumerable.Range( 1 , 100 )
                                .Aggregate( new Accumulator() ,
                                  (acc,n) => acc.Add(random.Next(0,1000))
                                ) ;
Console.WriteLine( summary ) ;

Answer 3

这相当简单，只需跟踪每一步的最小值和最大值：

Random number = new Random();
int min = int.MaxValue, max = int.MinValue;
for (int counter = 0; counter < 100; counter++)
{
    int n = number.Next(0,1000);
    min = Math.Min(min, n);
    max = Math.Max(max, n);
}

Console.WriteLine(min);
Console.WriteLine(max);

Answer 4

Random number = new Random();
int n;
int min=1000;
int max=0;

for (int counter = 0; counter < 100; counter++)
{
    n= number.Next(0,1000);

    if (n>max)
    {
        max=n;
    }

    if (n<min)
    {
        min=n;
    }

    Console.WriteLine(n);
}

Console.WriteLine("max:"+max);
Console.WriteLine("min:"+min);