relacontainer.cpp

//
// Created by light on 19-12-16.
//

#include "../container1/output_container.h"
#include <functional>
#include <iostream>
#include <map>
#include <set>
#include <string>
#include <tuple>

using namespace std;

int main() {
  set<int> s{1, 1, 1, 2, 3, 4};
  cout << s << endl;

  multiset<int, greater<int>> ms{1, 1, 1, 2, 3, 4};
  cout << ms << endl;

  map<string, int> mp{{"one", 1}, {"two", 2}, {"three", 3}, {"four", 4}};

  cout << mp << endl;

  mp.insert({"four", 4});
  cout << mp << endl;

  cout << (mp.find("four") == mp.end()) << endl;

  cout << (mp.find("five") == mp.end()) << endl;

  mp["five"] = 5;

  cout << mp << endl;

  multimap<string, int> mmp{{"one", 1}, {"two", 2}, {"three", 3}, {"four", 4}};

  cout << mmp << endl;

  mmp.insert({"four", -4});

  cout << mmp << endl;

  cout << (mp.find("four")->second) << endl;
  cout << (mp.lower_bound("four")->second) << endl;

  cout << (mp.upper_bound("four")->second) << endl;
  cout << ((--mp.upper_bound("four"))->second) << endl;

  multimap<string, int>::iterator lower, upper;
  std::tie(lower, upper) = mmp.equal_range("four");
  cout << (lower != upper) << endl; // 检测区间非空

  cout << lower->second << endl;
  cout << (--upper)->second << endl;
}