57 lines
1.2 KiB
C++
57 lines
1.2 KiB
C++
//
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// Created by light on 19-12-16.
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//
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#include "../container1/output_container.h"
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#include <functional>
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#include <iostream>
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#include <map>
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#include <set>
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#include <string>
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#include <tuple>
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using namespace std;
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int main() {
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set<int> s{1, 1, 1, 2, 3, 4};
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cout << s << endl;
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multiset<int, greater<int>> ms{1, 1, 1, 2, 3, 4};
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cout << ms << endl;
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map<string, int> mp{{"one", 1}, {"two", 2}, {"three", 3}, {"four", 4}};
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cout << mp << endl;
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mp.insert({"four", 4});
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cout << mp << endl;
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cout << (mp.find("four") == mp.end()) << endl;
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cout << (mp.find("five") == mp.end()) << endl;
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mp["five"] = 5;
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cout << mp << endl;
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multimap<string, int> mmp{{"one", 1}, {"two", 2}, {"three", 3}, {"four", 4}};
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cout << mmp << endl;
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mmp.insert({"four", -4});
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cout << mmp << endl;
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cout << (mp.find("four")->second) << endl;
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cout << (mp.lower_bound("four")->second) << endl;
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cout << (mp.upper_bound("four")->second) << endl;
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cout << ((--mp.upper_bound("four"))->second) << endl;
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multimap<string, int>::iterator lower, upper;
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std::tie(lower, upper) = mmp.equal_range("four");
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cout << (lower != upper) << endl; // 检测区间非空
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cout << lower->second << endl;
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cout << (--upper)->second << endl;
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} |