how to do sets in cpp
#include <set>
int main() {
set<int> my_set = {1, 2, 3, 4};
for (int i = 0; i < 4; i++) {
cout << my_set[i] << endl;
}
}how to do sets in cpp
#include <set>
int main() {
set<int> my_set = {1, 2, 3, 4};
for (int i = 0; i < 4; i++) {
cout << my_set[i] << endl;
}
}set in c++
#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 Presentn";
}else{
cout <<" presentn";
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;
}set c++
// constructing sets
#include <iostream>
#include <set>
bool fncomp (int lhs, int rhs) {return lhs<rhs;}
struct classcomp {
bool operator() (const int& lhs, const int& rhs) const
{return lhs<rhs;}
};
int main ()
{
std::set<int> first; // empty set of ints
int myints[]= {10,20,30,40,50};
std::set<int> second (myints,myints+5); // range
std::set<int> third (second); // a copy of second
std::set<int> fourth (second.begin(), second.end()); // iterator ctor.
std::set<int,classcomp> fifth; // class as Compare
bool(*fn_pt)(int,int) = fncomp;
std::set<int,bool(*)(int,int)> sixth (fn_pt); // function pointer as Compare
return 0;
}Copyright © 2021 Codeinu
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