unordered_map<string, vector<string>>letters{//声母--韵母 组合{"B",{"a","o","i","u","ai","ei","ao","iao","ie","an","ian","en","in","ang","eng","ing"}}, {"P",{"a","o","i","u","ai","ei","ao","iao","ou","ie","an","ian",
insert({ tmp,i }); // call operator< } for (auto iter : testmap) { std::cout << iter.first.index << std::endl; // 0,1,2,3,4, as sorted } unordered_map class Myclass { public: int index; Myclass() { index = 0; }; Myclass(const Myclass& other) { index = other....
map<int, string> myMap; // 插入元素 myMap.insert(make_pair(1,"One")); //遍历元素 for (constauto& pair : myMap) { std::cout <<"Key: " << pair.first <<", Value: " << pair.second << std::endl; } // 删除元素 myMap.erase(2); // 查找元素 map<int, string>::iterator...
1.5 unordered_map是关联容器,含有带唯一键的键-值对。搜索、插入和元素移除拥有平均常数时间复杂度。 1、C/C++中常用容器功能汇总 1.1 vector(数组)封装动态数组的顺序容器。 at():所需元素值的引用。 front():访问第一个元素(返回引用)。 back():访问最后一个元素(返回引用)。 beign():返回指向容器第...
unordered_map<string, vector<string>>letters{//声母--韵母 组合{"B",{"a","o","i","u","ai","ei","ao","iao","ie","an","ian","en","in","ang","eng","ing"}}, {"P",{"a","o","i","u","ai","ei","ao","iao","ou","ie","an","ian","en","in","ang","...
#include<vector> #include<assert.h> usingnamespacestd; template<classT>//哈希函数的模板 structhashfun{ size_toperator()(constT&key){ return(size_t)key; } }; template<>//string用的多,进行了特化处理 structhashfun<string>{ size_toperator()(conststring&str){ ...
问如何在C++ 11及更高版本中以std::vector的形式手动发布std::map和std::unordered_map资源ENstd::...
所以最好使用std::string。如果非要用char*,需要使用find_if函数并且用bind2sd函数指定比较函数。1 #include <map> 2 #include <algorithm> 3 #include <iostream> 4 5 using namespace std; 6 7 bool search(pair<char*, int> a, const char* b) 8 { 9 return strcmp(a.first, b) == 0 ?
Solution with Unorder_Map,Solution with Vector,Problem I expected both implementations to perform similarly, as the time complexity of accessing elements in an unordered_map and a vector is generally O(1). However, it seems that the implementation with unordered_set resulted in a TLE, while the...
flann编程语言提供了很多的基本数据类型，比如char，int，float，double等等。在C和C++的世界中，还有一种...