////////////////////////////////////////
// 2018/04/28 13:45:21
// set-empty
// ture if set is empty
#include <iostream>
#include <set>
using namespace std;
void print(set<int, less<int>>& s){
set<int, less<int>>::iterator it;
for (it = s.begin(); it != s.end(); it++){
cout << *it << " ";
}
cout << endl;
}
//======================
int main(){
int ary[] = { 1, 2, 3, 2, 3, 4, 8, 2, 5, 6 };
set<int, less<int>> s;
s.insert(ary, ary + 10);
print(s);
cout << "set is ";
s.empty() ? cout << "" : cout << "not ";
cout << "empty." << endl;
s.clear();
cout << "set is ";
s.empty() ? cout << " " : cout << "not";
cout << "empty." << endl;
return 0;
}
/*
OUTPUT:
1 2 3 4 5 6 8
set is not empty.
set is empty.
*/
set-empty
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