问题描述：
count.sh: line 28: 2.23577e+06+230: syntax error: invalid arithmetic operator (error token is ".23577e+06+230")
解决如下：
awk 'BEGIN{FS=",";ttime=0}{ttime=$12+ttime}END{printf ttime}') 原来错误
awk 'BEGIN{FS=",";ttime=0}{ttime=$12+ttime}END{printf"%d\n",ttime}') 修正
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