10/03/04 21:44:52 .net
>>339
man gawkより
gsub(r, s [, t])
For each substring matching the regular expression r in the string t,
substitute the string s, and return the number of substitutions.
If t is not supplied, use $0. An & in the replacement text is
replaced with the text that was actually matched. Use \& to get a
literal &. (This must be typed as "\\&"; see GAWK: Effective AWK
Programming for a fuller discussion of the rules for &'s and
backslashes in the replacement text of sub(), gsub(), and gen sub().)