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z_log.c

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00001 #include "f2c.h"
00002 
00003 #ifdef KR_headers
00004 double log(), f__cabs(), atan2();
00005 VOID z_log(r, z) doublecomplex *r, *z;
00006 #else
00007 #undef abs
00008 #include "mathh.h"
00009 extern double f__cabs(double, double);
00010 void z_log(doublecomplex *r, doublecomplex *z)
00011 #endif
00012 {
00013 
00014 r->i = atan2(z->i, z->r);
00015 r->r = log( f__cabs( z->r, z->i ) );
00016 }
 
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