W3School TIY Editor

#include <iostream>

#include <map>

using namespace std;

​

int main() {

  // 创建存储人员姓名和年龄的映射表

  map<string, int> people = { {"Bill", 19}, {"Steve", 32}, {"Elon", 26} };

​

  // 获取键 "Elon" 对应的值

  cout << "Elon 的年龄是: " << people.at("Elon") << "\n"; 

​

  // 获取键 "Steve" 对应的值

  cout << "Steve 的年龄是: " << people.at("Steve") << "\n";

​

  return 0;

}