cc [ flags ] -I/usr/local/include file(s) -L/usr/local/lib -lmcw [ ... ] #include <mathcw.h> extern float elldif (float phi, float k); extern double elldi (double phi, double k); extern long double elldil (long double phi, long double k); extern __float80 elldiw (__float80 phi, __float80 k); extern __float128 elldiq (__float128 phi, __float128 k); extern long_long_double elldill (long_long_double phi, long_long_double k); extern decimal_float elldidf (decimal_float phi, decimal_float k); extern decimal_double elldid (decimal_double phi, decimal_double k); extern decimal_long_double elldidl (decimal_long_double phi, decimal_long_double k); extern decimal_long_long_double elldidll (decimal_long_long_double phi, decimal_long_long_double k);
NB: Functions with prototypes containing underscores in type names may be available only with certain extended compilers.
elldi(phi,k) = integral(t=0:phi) (sin(t))**2 * (1 - (k *sin(t))**2)**(-1/2) dtwhere phi is an angle in radians in [0, 2*pi] and k is in [-1,+1].