modern-cpp-tutorial/code/4/4.2.unordered.map.cpp at master · rainlow/modern-cpp-tutorial · GitHub

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//

// 4.2.unordered.map.cpp

// chapter 04 containers

// modern c++ tutorial

//

// created by changkun at changkun.de

// https://github.com/changkun/modern-cpp-tutorial

//

#include <iostream>

#include <string>

#include <unordered_map>

#include <map>

int main() {

// initialized in same order

std::unordered_map<int, std::string> u = {

{1, "1"},

{3, "3"},

{2, "2"}

};

std::map<int, std::string> v = {

{1, "1"},

{3, "3"},

{2, "2"}

};

// iterates in the same way

std::cout << "std::unordered_map" << std::endl;

for( const auto & n : u)

std::cout << "Key:[" << n.first << "] Value:[" << n.second << "]\n";

std::cout << std::endl;

std::cout << "std::map" << std::endl;

for( const auto & n : v)

std::cout << "Key:[" << n.first << "] Value:[" << n.second << "]\n";

}