C++ 기술을 익히는 데 필요한 지식과 기술은 무엇입니까?

#include <iostream>
#include <vector>

using namespace std;

class Student {
public:
    string name;
    vector<int> grades;
};

int main() {
    // 创建学生对象列表
    vector<Student> students;

    // 添加学生数据
    Student s1 = {"John", {90, 85, 88}};
    Student s2 = {"Mary", {85, 92, 89}};
    students.push_back(s1);
    students.push_back(s2);

    // 计算学生平均成绩
    for (auto& student : students) {
        double sum = 0;
        for (auto& grade : student.grades) {
            sum += grade;
        }
        cout << student.name << ": " << sum / student.grades.size() << endl;
    }

    return 0;
}