#include "f2c.h"

#ifdef KR_headers
double atan2();
double d_atn2(x, y) doublereal *x, *y;
#else
#undef abs
#include "math.h"
double d_atn2(doublereal *x, doublereal *y)
#endif
{
  return(atan2(*x, *y));
}
