unordered_map<string, struct>如果是结构体如何遍历

可以使用 C++11 新增的范围遍历语法，对 `unordered_map` 中的键值对进行遍历，代码示例如下：

#include <iostream>
#include <unordered_map>
#include <string>

struct Person {
    int age;
    std::string address;
};

int main() {
    std::unordered_map<std::string, Person> personMap = {
        {"Tom", {20, "Beijing"}},
        {"Jerry", {25, "Shanghai"}},
        {"Kate", {18, "Guangzhou"}}
    };

    // 使用范围遍历语法访问 unordered_map 中的键值对
    for (const auto& [name, person] : personMap) {
        std::cout << "Name: " << name << ", Age: " << person.age
                  << ", Address: " << person.address << std::endl;
    }

    return 0;
}

输出结果为：

Name: Tom, Age: 20, Address: Beijing
Name: Jerry, Age: 25, Address: Shanghai
Name: Kate, Age: 18, Address: Guangzhou