那个X=MID(S,I,
1个回答
mid是取子串的函数
st为:所要取的源字符串,i+1是开始取的位置.
mid(st,i+1)的意思是:
从字符串st中的第i+1的位置开始取,一直取完st里面i+1开始后面的字符
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