保存学生的简明资料，要求按学号排序，使用映射关联容器

（因为不会重号）是最合适的。如用姓名排序，因姓名可能重复，使用多重映射更为合适。

使用时要用头文件<set>。map和multimap将key/value pair当做元素进行管理，并根据key

的排序准则自动将元素排序。-Save students concise, asking sorted by student number, use the mapping associated with the container (because it would not re-number) is the most appropriate. With names such as sorting, due to possible duplication of names, more appropriate use of multiple maps. Use the header files used <set> . map and multimap will be key/value pair as an element of management and, based on key elements of the sort criteria for automatically sorting.