复制代码 代码如下: /// <summary> /// 产生无重复随机数 /// </summary> /// <param name="num">个数</param> /// <param name="minValue">最小数</param> /// <param name="maxValue">最大数</param> /// <returns>数组</returns> public int[] getNum(int num, int minValue, int maxValue) { Random ra = new Random(unchecked((int)DateTime.Now.Ticks)); int[] arrNum = new int[num];//注意:数组中各元素的初始值是0,当0在取值范围内时要另处理 int tmp = 0; for (int i = 0; i < num; i++) { tmp = getRandomNum(tmp, minValue, maxValue, ra);//取出值赋到数组中
if (Array.IndexOf(arrNum, tmp) < 0)//判断是否存在,不存在的话元素tmp的索引应为-1 { arrNum[i] = tmp; } else { i = i - 1; } } return arrNum; } public int getRandomNum(int tmp, int minValue, int maxValue, Random ra) { tmp = ra.Next(minValue, maxValue); return tmp; }
