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C/C++ Source or Header  |  1991-06-10  |  133 b   |  10 lines
  1. #include "f2c.h"
  2.  
  3. double d_sign(a,b)
  4. doublereal *a, *b;
  5. {
  6. double x;
  7. x = (*a >= 0 ? *a : - *a);
  8. return( *b >= 0 ? x : -x);
  9. }
  10.