详解:
http://www.programmerinterview.com/index.php/java-questions/find-trailing-zeros-in-factorial/
http://www.purplemath.com/modules/factzero.htm
详解:
http://www.programmerinterview.com/index.php/java-questions/find-trailing-zeros-in-factorial/
http://www.purplemath.com/modules/factzero.htm