42 lines
831 B
C++
42 lines
831 B
C++
#include <iostream>
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#include <set>//也是set
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using namespace std;
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class compare{
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public:
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template <class T>
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bool operator()(const T& a, const T& b){
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return a > b;
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}
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};
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int main(){
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auto cmpl = [](auto a, auto b){
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return a < b;
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};
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multiset<int> a{1,1,2,3,3,3,4,5,6,7,7,7,10};
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multiset<int, decltype(cmpl)> b(cmpl);
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b.insert({14,16,20,18,2,2,2,4,4,6,6,8,8,10,12});
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multiset<int, compare> c{1,3,5,7,9,11,11,11,13};
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for(int x : a){
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cout << x << " ";
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}cout << endl;
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for(int x : b){
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cout << x << " ";
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}cout << endl;
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for(int x : c){
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cout << x << " ";
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}cout << endl;
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cout << b.count(2) << endl;
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cout << *b.upper_bound(6) << " " << *b.lower_bound(6) << endl;
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return 0;
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}
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/*
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1 1 2 3 3 3 4 5 6 7 7 7 10
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2 2 2 4 4 6 6 8 8 10 12 14 16 18 20
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13 11 11 11 9 7 5 3 1
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3
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8 6
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*/
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//基本用法与set一致，可以有多个重复元素
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