"c++ set comparator" Code Answer's
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set in c++
Weary Wolf
on Dec 04, 2020
#include <bits/stdc++.h>
#include <iostream>
#include <vector>
#include <algorithm>
#include <set>
using namespace std;
//set mentains internally the ascending order of these numbers
void setDemo()
{
set<int> S;
S.insert(1);
S.insert(2);
S.insert(-1);
S.insert(-10);
S.erase(1);//to remove an element
//Print all the values of the set in ascending order
for(int x:S){
cout<<x<<" ";
}
//check whether an element is present in a set or not
auto it = S.find(-1);//this will return an iterator to -1
//if not present it will return an iterator to S.end()
if (it == S.end()){
cout<<"not Present\n";
}else{
cout <<" present\n";
cout << *it <<endl;
}
//iterator to the first element in the set which is
//greater than or equal to -1
auto it2 = S.lower_bound(-1);
//for strictly greater than -1
auto it3 = S.upper_bound(-1);
//print the contents of both the iterators
cout<<*it2<<" "<<*it3<<endl;
}
int main() {
setDemo();
return 0;
}c++ custom compare in set
Helpless Hare
on Dec 06, 2020
struct compare {
bool operator() (const int& x, const int& y) const {
return x<y; // if x<y then x will come before y. Change this condition as per requirement
}
};
int main()
{
set<int,compare> s; //use the comparator like this
}c++ set comparator
Alert Anteater
on Mar 13, 2021
set<int, less<int>> st;
// or
set<int, greater<int>> st;
// c++ 11
auto cmp = [](int a, int b) { return ... };
set<int, decltype(cmp)> s(cmp);All those coders who are working on the C++ based application and are stuck on c++ set comparator can get a collection of related answers to their query. Programmers need to enter their query on c++ set comparator related to C++ code and they'll get their ambiguities clear immediately. On our webpage, there are tutorials about c++ set comparator for the programmers working on C++ code while coding their module. Coders are also allowed to rectify already present answers of c++ set comparator while working on the C++ language code. Developers can add up suggestions if they deem fit any other answer relating to "c++ set comparator". Visit this developer's friendly online web community, CodeProZone, and get your queries like c++ set comparator resolved professionally and stay updated to the latest C++ updates.
