如何将部分初始化的结构对象放入向量中？

#include <iostream>
#include <vector>

// 定义结构体
struct MyStruct {
    int field1;
    float field2;
    std::string field3;
};

int main() {
    // 创建向量
    std::vector<MyStruct> myVector;

    // 初始化结构对象的部分字段并添加到向量中
    MyStruct obj1 = {1, 2.5, "Hello"};
    myVector.push_back(obj1);

    MyStruct obj2;
    obj2.field1 = 2;
    obj2.field3 = "World";
    myVector.push_back(obj2);

    // 输出向量中的结构对象
    for (const auto& obj : myVector) {
        std::cout << "field1: " << obj.field1 << ", field2: " << obj.field2 << ", field3: " << obj.field3 << std::endl;
    }

    return 0;
}