所以，在头的C ++文档中有一个很好的功能，可以让您排序载体。我有一个类人。我有一个指针向量的那类对象（矢量＆lt;人*＆GT; ），我要比较的人通过不同的参数，例如年龄，姓名长度等等。

So, in the c++ documentation in the header there is a nice function that lets you sort vectors. I have a class Person. I have a vector of pointers to objects of that class (vector<Person*>) and I want to compare the people by different parameters, for example age, length of name and so on.

我已经有它返回所需的变量函数，但我不知道该怎么做。这是在C ++参考 http://www.cplusplus.com的链接排序向量函数/参考/算法/排序/

I already have functions which return the needed variables but I am not sure how to do that. Here is a link to the sort vector function in the c++ reference http://www.cplusplus.com/reference/algorithm/sort/

推荐答案

这是如此的简单：

struct student
{
  string name;
  string grade;
};

bool cmd(const student & s1, const student & s2)
{
   if (s1.name != s2.name) return s1.name < s2.name;
   return s1.grade < s2.grade;
}

然后：

vector<student> s;
sort(s.begin(), s.end(), cmd);

学生将alphabatically排序。如果两个学生有同样的名字，他们会用他们的等级进行排序。

Students will be sorted alphabatically. If two students have the same name, they will be ordered using their grade.