"set in cpp" Code Answer's
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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 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;
}
set in cpp
#include<iostream>
#include<set>
using namespace std;
int main(){
// Set with values
set<int, greater<int>> s1 = {6, 10, 5, 1};
// s1 = {10, 6, 5, 1}
// Inserting elements in the set
s1.insert(12);
s1.insert(20);
s1.insert(3);
// Iterator for the set
set<int> :: iterator it;
// Print the elements of the set
for(it=s1.begin(); it != s1.end();it++)
cout<<*it<<" ";
cout<<endl;
}
Source: www.journaldev.com
set in cpp
#include<iostream>
#include<set>
using namespace std;
int main(){
// Set with values
set<int, greater<int>> s1 = {6, 10, 5, 1};
// Iterator for the set
set<int> :: iterator it;
// Print the elements of the set
for(it=s1.begin(); it != s1.end();it++)
cout<<*it<<" ";
cout<<endl;
}
Source: www.journaldev.com
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;
}
Source: www.cplusplus.com
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