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Text File  |  1986-11-20  |  301b  |  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.