list详解

#include <iostream>
#include <vector>
#include <list>

std::list<std::string> getTotalEntrollment(std::vector<std::list<std::string>> courseStudent,
                                            std::list<std::string> dropStudent)
{
    std::list<std::string> allStudent;
    for(auto &list : courseStudent)
    {
        allStudent.insert(std::end(allStudent),std::begin(list),std::end(list));
    }
    allStudent.sort();　　　　　　//升序排列
    allStudent.unique();　　　　　//去除重复的std::stirng name
    for(auto &it : dropStudent)
    {
        allStudent.remove(it);　　//去除在courseStudent中出现的dropStudent中的元素，注意这里不能用erase()方法
    }
    return allStudent;
}
int main()
{
    std::list<std::string> list_1;
    std::list<std::string> list_2;
    std::list<std::string> list_3;
    std::vector<std::list<std::string>> vecList;
    std::list<std::string> resultList;
    std::list<std::string> dropList;

    list_1.push_back("abc");
    list_1.push_back("bcd");
    list_1.push_back("cde");

    list_2.push_back("dnd");
    list_2.push_back("skd");
    list_2.push_back("dnd");

    list_3.push_back("213");
    list_3.push_back("424");
    list_3.push_back("424");

    dropList.push_back("abc");
    dropList.push_back("dnd");

    vecList.push_back(list_1);
    vecList.push_back(list_2);
    vecList.push_back(list_3);

    resultList = getTotalEntrollment(vecList,dropList);

    for(auto it : resultList)
    {
        std::cout << it << std::endl;
    }

    return 0;
}

结果是：

213
424
bcd
cde
skd