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Top Forums Shell Programming and Scripting How to create SQRT function in catenate file Post 302150049 by vgersh99 on Monday 10th of December 2007 01:35:16 AM
Old 12-10-2007
Quote:
Originally Posted by ahjiefreak
Hi ,

Do you mean using the same code that I described earlier on?


Please advise. Thanks.


-Jason
No, this 'code' will not work for multiple reasons.
What I mean (for starters) why cannot use awk's "sqrt" built-in function?
I guess I don't understand:
  1. what "t=sqrt($t)' | bc -l " is supposed to do
  2. what is the value of 'h' in "t= h*($3+$2);"
  3. What do think the value of $2 and $1 will be in the 'END' block
  4. what's the intent of this: count($1)=$2/t
  5. why are you doing this 'cat a.txt'
 

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SQRT(3) 						   BSD Library Functions Manual 						   SQRT(3)

NAME
cbrt, cbrtf, cbrtl, sqrt, sqrtf, sqrtl -- cube root and square root functions LIBRARY
Math Library (libm, -lm) SYNOPSIS
#include <math.h> double cbrt(double x); float cbrtf(float x); long double cbrtl(long double x); double sqrt(double x); float sqrtf(float x); long double sqrtl(long double x); DESCRIPTION
The cbrt(), cbrtf(), and cbrtl() functions compute the cube root of x. The sqrt(), sqrtf(), and sqrtl() functions compute the non-negative square root of x. RETURN VALUES
The cbrt(), cbrtf(), and cbrtl() functions return the requested cube root. The sqrt(), sqrtf(), and sqrtl() functions return the requested square root unless an error occurs. An attempt to take the sqrt() of negative x raises an invalid exception and causes an NaN to be returned (except that the square root of -0 is valid and equal to -0.) SEE ALSO
fenv(3), math(3) STANDARDS
The cbrt(), cbrtf(), cbrtl(), sqrt(), sqrtf(), and sqrtl() functions conform to ISO/IEC 9899:1999 (``ISO C99''). HISTORY
The cbrt() function appeared in 4.3BSD. The sqrtl() function appeared in FreeBSD 8.0. The cbrtl() function appeared in FreeBSD 9.0. BSD
March 5, 2011 BSD
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