c#小数化最简分数算法

//小数化分数主函数 public static string XXtoBL(decimal XX) { int x1 = 1; //判断传入的数小数点后有几位小数 int XXWS = XX.ToString().IndexOf("."); string XXBF = XX.ToString().Substring(XXWS + 1, XX.ToString().Length - XXWS - 1); for (int i = 0; i < XXBF.Length; i++) { x1 = x1 * 10; } int x2 = (int)(XX * x1); //寻找公约数 int GYS = MaxY(x1, x2); x1 = x1 / GYS; x2 = x2 / GYS; string BL = ""; BL = x1.ToString() + ":" + x2.ToString(); return BL; } //求最大公约数的函数 public static int MaxY(int firstNumber, int secondNumber) { int max =0; int min=0; if (firstNumber > secondNumber) { max = firstNumber; min = secondNumber; } else { max = secondNumber; min = firstNumber; } int r = max % min; if (r == 0) { return min; } else { while (r != 0) { max = min; min = r; r = max % min; } return min; } }