带小数的随机数[重复]

Question

我是 C# 的初学者，我创建了这个程序来生成 7 个随机数并在控制台中显示它们。但现在我想生成 18.0-23.5 范围内的小数。 但我不知道怎么做？我试过Next.Double，但我无法让它工作。请帮忙！

这是我的程序：

int lotto1 = 0, lotto2 = 0, lotto3 = 0, lotto4 = 0, lotto5 = 0, lotto6 = 0, lotto7 = 0;
Random rnd = new Random();

Console.WriteLine("Din lottorad är:");
lotto1 = rnd.Next(1, 36);
Console.WriteLine("Nr1: " + lotto1);
lotto2 = rnd.Next(1, 36);
Console.WriteLine("Nr2: " + lotto2);
lotto3 = rnd.Next(1, 36);
Console.WriteLine("Nr3: " + lotto3);
lotto4 = rnd.Next(1, 36);
Console.WriteLine("Nr4: " + lotto4);
lotto5 = rnd.Next(1, 36);
Console.WriteLine("Nr5: " + lotto5);
lotto6 = rnd.Next(1, 36);
Console.WriteLine("Nr6: " + lotto6);
lotto7 = rnd.Next(1, 36);
Console.WriteLine("Nr7: " + lotto7);

Answer 1

使用NextDouble:

 rnd.NextDouble() * (23.5-18.0) + 18.0

或更笼统地说：

public double NextDouble(Random rnd, double min, double max)
{
    return rnd.NextDouble() * (max-min) + min;
}