1#include "f2c.h"
2
3#ifdef KR_headers
4extern double log(), f__cabs(), atan2();
5VOID c_log(r, z) complex *r, *z;
6#else
7#undef abs
8#include "math.h"
9extern double f__cabs(double, double);
10
11void c_log(complex *r, complex *z)
12#endif
13{
14	double zi, zr;
15	r->i = atan2(zi = z->i, zr = z->r);
16	r->r = log( f__cabs(zr, zi) );
17	}
18