1、理论分析：Assume a string s contains x+y characters;x is the number of C茑霁酌绡hinese characters;y is the number of English characters;LEN(s)=x+y;LENB(s)=2*x+yx=LENB(s)-LEN(s)y=2*LEN(s)-LENB(s)if there is a special character in the string;can devide the string into two substring;usethis special character.function:FIND()
3、也可以用于检测单元格中是否含有中文
