#include "f2c.h"#ifdef KR_headersdouble sin(), cos(), sinh(), cosh();VOID z_sin(r, z) doublecomplex *r, *z;#else#undef abs#include "math.h"void z_sin(doublecomplex *r, doublecomplex *z)#endif{double zi = z->i, zr = z->r;r->r = sin(zr) * cosh(zi);r->i = cos(zr) * sinh(zi);}