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C/C++ Source or Header  |  1995-01-28  |  305b  |  17 lines
  1. #include "f2c.h"
  2.  
  3. #ifdef KR_headers
  4. double log(), f__cabs(), atan2();
  5. VOID z_log(r, z) doublecomplex *r, *z;
  6. #else
  7. #undef abs
  8. #include "math.h"
  9. extern double f__cabs(double, double);
  10. void z_log(doublecomplex *r, doublecomplex *z)
  11. #endif
  12. {
  13.  
  14. r->i = atan2(z->i, z->r);
  15. r->r = log( f__cabs( z->r, z->i ) );
  16. }
  17.