Problem with awk syntax


 
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# 8  
Old 05-19-2011
Code:
awk '/^[0-9+-]+$/&&/\+/' num

---------- Post updated at 08:32 AM ---------- Previous update was at 08:31 AM ----------

Code:
$ cat tst
+1
0+1
1
a
+a
1+
a+
let x=x+1
$ awk '/^[0-9+-]+$/&&/\+/' tst
+1
0+1
1+

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