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NDK C++ map容器

news 2025/8/18 5:55:34

map容器

// TODO map容器
#include <iostream>
#include <map>using namespace std;int main() {// TODO map<int, string>按key值排序，同一个key不可以重复插入map<int, string> map1;map1.insert(pair<int, string>(1, "111"));map1.insert(pair<int, string>(3, "333"));map1.insert(pair<int, string>(2, "222"));map1.insert(pair<int, string>(2, "2222"));// 修改key对应的 valuemap1[3] = "3333";for (map<int, string>::iterator it = map1.begin(); it != map1.end(); it++) {cout << "key " << it->first << ",value " << it->second << endl;}cout << endl;// TODO multimap<int, string>按key值排序，可以重复插入同的key，使用场景--分组multimap<int, string> multimap1;multimap1.insert(pair<int, string>(1, "111"));multimap1.insert(pair<int, string>(3, "333"));multimap1.insert(pair<int, string>(2, "222"));multimap1.insert(pair<int, string>(2, "2222"));multimap1.insert(pair<int, string>(2, "22"));for (auto it = multimap1.begin(); it != multimap1.end(); it++) {cout << "key " << it->first << ",value " << it->second << endl;}int key;cout << "请输入要查找的key：" << endl;cin >> key;multimap<int, string>::iterator it = multimap1.find(key);for (; it != multimap1.end(); it++) {if (it->first != key) {break;}cout << "key " << it->first << ",value " << it->second << endl;}return 0;
}