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using System;
using System.Linq;
namespace DSALib.Auxiliary
{
public static class Dice // roll it!
{
private static readonly Random Rnd = new Random();
public static int Roll(int d = 20)
{
return Rnd.Next(d) + 1;
}
public static int Roll(string input)
{
var strings = input.ToLower().Split(new[] {'w', 'd'}, 2, StringSplitOptions.RemoveEmptyEntries).ToList();
if (strings.Count != 2)
throw new ArgumentException($"{input}: does not satisfy the format requirements( dice count (d|w) die size)");
var count = Convert.ToInt32(strings[0]);
var d = Convert.ToInt32(strings[0]);
return Roll(count, d);
}
public static int Roll(int count, int d)
{
if (d <= 0 || count <= 0) return 0;
var sum = 0;
for (var i = 0; i < Math.Abs(count); i++)
{
var roll = Roll(d);
sum += roll;
}
sum *= Math.Abs(count) / count;
return sum;
}
}
}
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