角弧度互换

//角度、弧度互化计算类
   class jiaodu2hudu
   {
       public double dms_rad(double a) //角度转弧度
       {
           double sign = (a < 0) ? -1.0 : 1.0;
           a = System.Math.Abs(a);
 
           int dd = (int)(System.Math.Floor(a));
           a = a - dd;
 
           int mm = (int)System.Math.Floor(a * 100.0);
           a = (a * 100.0 - mm) * 100.0;
 
           a = sign * (dd * 3600.0 + mm * 60.0 + a) * (Math.PI / (180 * 3600));
           return a;
       }
 
       public double rad_dms(double a) //弧度转角度
       {
           double sign = (a < 0) ? -1.0 : 1.0;
           a = System.Math.Abs(a);
           a = a * 57.2957795130823;
 
           int d = (int)(System.Math.Floor(a));
           a = a - d;
           int m = (int)System.Math.Floor(a * 60.0);
           a = (a - m / 60.0) * 3600.0;
           if (a + 0.0001 > 60) { a = 0; m = m + 1; }
           if (m >= 60) { m = 0; d = d + 1; }
           a = d + m / 100.0 + a / 10000.0;
           return a*sign;
       }
 
   }