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- From: matsuda@linc.cis.upenn.edu (N o s t a l g i a)
- Newsgroups: comp.unix.questions
- Subject: A Novice^2 nawk question
- Keywords: nawk, iteration
- Message-ID: <87387@netnews.upenn.edu>
- Date: 29 Aug 92 16:36:32 GMT
- Sender: news@netnews.upenn.edu
- Organization: University of Pennsylvania
- Lines: 48
- Nntp-Posting-Host: linc.cis.upenn.edu
-
-
- Hi,
-
-
- Here's a novice^2 question on awk. I wrote the following awk program that
- tries to find a root of a number (don't ask me why -- it's a part of my process
- of learning awk!). Silly as it is, the program takes two arguments, the
- number, and the number of root, and if you enter 4 2, it will give 2
- (sqrt(4)=2, ignoring the negative one!) plus the computed original number (how
- could I call this in English anyway?).
-
- The algorism I followed was to start with one, and adding one until $1^(that
- number) exceeds the number whose root is being searched. At that point, 0.1
- will be added to (that number-1), until it will exceed the number whose root is
- being searched. Pretty stupid, but works fine -- except for two things: If the
- program goes to the very bottom (and print out "last"), then the program won't
- read the next record, and I will have to runt he program again. How this is so?
- I gather this has something to do with "getting away" from the loop, but I
- cannot put my finger on what.
-
- Second, if I enter numbers like 40 500 (yes, 500th-root of 40!), they will give
- an error message saying "nawk: pow result out of range". How is this so? Is
- there anyway to evade this problem?
-
- Third, is there any better algorism to do the same thing without invoking the
- build-in functions?
-
- Thank you very much,
-
-
- Kenjiro Matsuda
- Dept. of Linguistics
- University of Pennsylvania
- matsuda@linc.cis.upenn.edu
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