当值为地址C++时，如何通过键使用映射值

#include <iostream>
#include <map>

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

    // 添加映射关系
    addressMap["John"] = "123 Main St";
    addressMap["Alice"] = "456 Elm St";
    addressMap["Bob"] = "789 Oak St";

    // 通过键来访问映射值
    std::cout << "Bob's address: " << addressMap["Bob"] << std::endl;

    return 0;
}

Bob's address: 789 Oak St