稍后使用调用类构造函数创建std::vector<Class>

#include <iostream>
#include <vector>

class Person {
public:
    std::string name;
    int age;

    // 构造函数
    Person(const std::string& n, int a) : name(n), age(a) {
        std::cout << "Person created: " << name << ", " << age << std::endl;
    }
};

int main() {
    // 创建一个Person对象的vector
    std::vector<Person> people;

    // 添加元素到vector
    people.emplace_back("Alice", 30); // 使用emplace_back直接在vector中构造对象
    people.emplace_back("Bob", 25);

    // 遍历并打印vector中的元素
    for (const auto& person : people) {
        std::cout << "Name: " << person.name << ", Age: " << person.age << std::endl;
    }

    return 0;
}

try {
    people.emplace_back("Charlie", 35); // 如果构造函数抛出异常，vector不会被破坏
} catch (const std::exception& e) {
    std::cerr << "Exception caught: " << e.what() << std::endl;
    // 处理异常情况
}