练习2字符串子集和数值的提取 Input String Subset Lengthl VOLTS DC +1.345E+02 [32 Subset Offset ubset Offsel String Subset String Sub 321 abc Subset Length String Subset Input Stri b Number offset Numbet 9 32 Number 13450 DBL 99 练习2 字符串子集和数值的提取