shell(²»ÊǺ¯Êý)£¬Åжϸ¡µãÊýÎÊÌâ,СÊýµãÈçºÎÅжÏ???
ÅжÏ×Ö·û´®ÊDz»ÊÇfloatÐ͵Ä,Óöµ½¶à¸öСÊýµãµÄ´íÎóÈçºÎ½â¾ö.(ÎÒÐèÒªµÄshell£¬¶ø·Çº¯Êý)лл
[code]
isfloat() {
[ $# -eq 1 ] || return $FAILURE
case "$1" in
*[!0-9.]*|"" ) return $FAILURE;;
* ) return $SUCCESS;;
esac
}
[/code]
"2.9 float
3.0a not float
2...1 float"
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