使用随机数只需要两步： (1)    创建随机种子，默认方式是以当前时间作为种子；Random r = new Random() (2)    取随机数；int i = r.Next(0, 3) //注意这里是取 [0, 3)的整数，但是取不到3               Random ranobj = new Random();             foreach (SangoWujiang w in wujiangs)             {                                int i = (int)w.Force - 1 + ranobj.Next(0, 3);                 if (i < 0)                 {                     w.Force = 0;                 }                 else                 {                     w.Force = (uint)i;                 }       }

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