c++遍历删除unordered_map

以下是C++遍历删除unordered_map的例子：
1. 使用迭代器遍历删除unordered_map

#include <iostream>
#include <unordered_map>

int main() {
    std::unordered_map<int, int> myMap = {{1, 10}, {2, 20}, {3, 30}, {4, 40}, {5, 50}};
    int target = 3;

    for (auto it = myMap.begin(); it != myMap.end();) {
        if (it->first == target) {
            it = myMap.erase(it);
        } else {
            ++it;
        }
    }

    for (const auto& pair : myMap) {
        std::cout << pair.first << " : " << pair.second << std::endl;
    }

    return 0;
}

2. 使用C++11的范围for循环遍历删除unordered_map

#include <iostream>
#include <unordered_map>

int main() {
    std::unordered_map<int, int> myMap = {{1, 10}, {2, 20}, {3, 30}, {4, 40}, {5, 50}};
    int target = 3;

    for (auto it = myMap.begin(); it != myMap.end();) {
        if (it->first == target) {
            it = myMap.erase(it);
        } else {
            ++it;
        }
    }

    for (const auto& pair : myMap) {
        std::cout << pair.first << " : " << pair.second << std::endl;
    }

    return 0;
}