在c++11和c++17中插入地图的方法？

#include <iostream>
#include <map>

int main() {
    std::map<std::string, int> myMap;

    // 插入元素
    myMap["apple"] = 1;
    myMap["banana"] = 2;

    // 访问元素
    std::cout << "apple: " << myMap["apple"] << std::endl;
    std::cout << "banana: " << myMap["banana"] << std::endl;

    return 0;
}

#include <iostream>
#include <map>

int main() {
    std::map<std::string, int> myMap;

    // 插入元素
    auto result = myMap.insert(std::make_pair("apple", 1));
    if (result.second) {
        std::cout << "Inserted apple: " << result.first->second << std::endl;
    }

    result = myMap.insert(std::make_pair("apple", 2));
    if (!result.second) {
        std::cout << "apple already exists with value: " << result.first->second << std::endl;
    }

    return 0;
}

auto result = myMap.insert(std::make_pair("apple", 2));
if (!result.second) {
    std::cout << "apple already exists with value: " << result.first->second << std::endl;
}

myMap["apple"] = 3; // 更新已存在的键的值