
#include <iostream>
#include <vector>
#include <string>
#include <sstream>
using namespace std;
 
struct Student {
    string name;
    int age;
    vector<int> grades;
 
    void display() const {
        cout << "Name: " << name << ", Age: " << age << ", Grades: ";
        for (int grade : grades) {
            cout << grade << " ";
        }
        cout << endl;
    }
};
 
int main() {
    vector<Student> students;
    string input;
    cout << "Enter student information (name age grades), type 'end' to stop:" << endl;
    while (true) {
        getline(cin, input);
        if (input == "end") break;
 
        istringstream iss(input);
        Student student;
        iss >> student.name >> student.age;
        int grade;
        while (iss >> grade) {
            student.grades.push_back(grade);
        }
        students.push_back(student);
    }
 
    cout << "Entered students:" << endl;
    for (const Student& student : students) {
        student.display();
    }
 
    return 0;
}

2. 文件输入输出（File I/O）

文件I/O操作允许将数据存储到文件中或从文件中读取。


#include <fstream>
#include <iostream>
#include <vector>
#include <string>
using namespace std;
 
struct Employee {
    string name;
    int id;
    double salary;
 
    void display() const {
        cout << "Name: " << name << ", ID: " << id << ", Salary: " << salary << endl;
    }
};
 
int main() {
    vector<Employee> employees = {
        {"Aoteman", 1, 50000},
        {"AotemanDaddy", 2, 60000},
        {"AotemanMami", 3, 70000}
    };
 
    ofstream outFile("employees.dat", ios::binary);
    if (!outFile) {
        cerr << "Error opening file for writing" << endl;
        return 1;
    }
    for (const Employee& emp : employees) {
        outFile.write((char*)&emp, sizeof(Employee));
    }
    outFile.close(

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