如何在C++中将key作为类插入到map STL中

class MyKey {
private:
    int keyData;

public:
    MyKey(int data) : keyData(data) {}

    bool operator<(const MyKey& other) const {
        return keyData < other.keyData;
    }
};

#include <iostream>
#include <map>

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

    MyKey key1(1);
    myMap[key1] = "Value 1";

    MyKey key2(2);
    myMap[key2] = "Value 2";

    // 可以继续插入更多的键值对

    // 遍历map并输出键值对
    for (const auto& pair : myMap) {
        std::cout << "Key: " << pair.first.keyData << ", Value: " << pair.second << std::endl;
    }

    return 0;
}