std list 排序

http://stackoverflow.com/questions/2432857/sort-list-using-stl-sort-function

http://m.blog.youkuaiyun.com/article/details?id=37738601

The standard algorithm std::sort requires random access iterators, which std::list<>::iterators are not (list iterators are bidirectional iterators).

You should use the std::list<>::sort member function.

std::list has a built-in sort method that you need to use since std::sort only works with random access iterators, whereas std::list::iterator merely belongs to the bidirectional iterator class of iterators.

定义排序函数：

方法1：声明外部比较函数

bool Less(const Student& s1, const Student& s2)
{
	return s1.name < s2.name; //从小到大排序
}
std::sort(sutVector.begin(), stuVector.end(), Less);

注意：比较函数必须写在类外部（全局区域）或声明为静态函数

当comp作为类的成员函数时，默认拥有一个this指针，这样和sort函数所需要使用的排序函数类型不一样。

否则，会出现<unresolved overloaded function type>错误

方法2：重载类的比较运算符

bool operator<(const Student& s1, const Student& s2)
{
    return s1.name < s2.name; //从小到大排序
}
std::sort(sutVector.begin(), stuVector.end());

方法3：声明比较类

struct Less
{
    bool operator()(const Student& s1, const Student& s2)
    {
        return s1.name < s2.name; //从小到大排序
    }
};

std::sort(sutVector.begin(), stuVector.end(), Less());