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Text File  |  1988-02-27  |  238 b   |  8 lines
  1. define(square_root, 
  2.     `ifelse(eval($1<0),1,negative-square-root,
  3.                  `square_root_aux($1, 1, eval(($1+1)/2))')')
  4. define(square_root_aux,
  5.     `ifelse($3, $2, $3,
  6.         $3, eval($1/$2), $3,
  7.         `square_root_aux($1, $3, eval(($3+($1/$3))/2))')')
  8.