将struct加到vector中

#include <iostream>
#include <vector>
#include <string>
using namespace std;

struct student
{
    string name;
    string gender;
    int age;
};

class Myclass
{
    public:
        void append(std::vector<student> &v,string name,string gender,int age)
        {
            student s;
            s.name = name;
            s.gender = gender;
            s.age = age;
            v.push_back(s);

        }
        
        int number(std::vector<student> v)
        {
            return (v.size());
        }
        string age(std::vector<student> v)
        {
            
            for (int i=0;i<v.size();i++)
            {
                if (v[i].age > 25)
                {
                    cout << v[i].name <<endl;
                }
            }
            
        }
};

int main()
{
    vector<student> v;
    Myclass cla;
    cla.append(v,"张三","男",26);
    cla.append(v,"李四","女",27);

    cout << "全班人数为： " <<cla.number(v)<<endl;
    return 0;
}