关于数据结构的问题。求各位大神帮忙

求大神给出完整代码，小弟不胜感激。
根据dataset来

Tung,Grace,1109853A-I011-0022,69.90
Jing,Vito,1109853U-I011-0113,53.98
Zhong,Amy,11098537-I011-0355,67.31
Yu,Fiona,1109853U-I011-0056,58.12
Lam,Stephen,11098536-I011-3419,68.34
Jia,Wallace,1109853C-I011-3905,58.78
Rui,Theodore,1109853L-I011-3126,75.80
Cai,Terry,11098531-I011-0437,40.00
Gui,Kathie,11098539-I011-0087,39.33
Teng,Robert,11098532-I011-8718,40.22
Weng,Frank,11098537-I011-9244,81.16
Pun,Alice,11098538-I011-0174,88.90
Vong,Alex,1109853J-I011-3679,63.52
大概就是这样子 先read 然后store