This team attendance system is implemented using C language and stores team member information and punch-in records through a linked list data structure.
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When the program starts, the initial information is input through a file. When the program is running, team member information can be added and deleted, and team member
information can be queried based on student ID (student ID, name, number of punch-ins, punch-in records, total working time) , punch-in records are printed in date order, or all team member information (student number, name, number of punch-ins) is printed in order of student number, and team member information can be exported into a file
. Team member information input format: student number, name, number of punch-ins, punch-in records (check-in date/check-in time) 2001 yzl 1 2022.1.1 8:00—21:30 2005 zh 3 2021.11.1 12:00—22:00 2021.11 .2 11:30—21:00 2021.11.4 10:30—21:00 The student number is a 4-digit unsigned integer [1000, 9999] and the name is a string of indefinite length (tips: use pointers) to check in Number of times range [0, 65536] punch record format year.month.day come:tim