如何使用字符串对对象向量进行排序？

Question

I have a class like this:

class student
{
    public:
    string name;
    int age;
    int rollnum;
    int year;
    string father;
    string mother;
    string category;
    string region;
    char sex;
    string branch;
    int semester;
};

I have created a vector (vector j1) of such class student, and now I want to sort them on the basis of their name.

How can I do that?

PS: I did this.

student lessthan
{
    bool operator() (const student& h1, const student& h2)
    {
        return (h1.name < h2.name);
    }
};

And then did this,

sort(j1.begin(),j1.end(),lessthan());

But this shows an error saying expected primary expression before bool.

Answer 1

sort( j1.begin(),
     j1.end(),
     [](const student& s1, const student& s2){ return s1.name < s2.name;} );