Question

How to declare, initialize and print a set in C++

Answer 1

#include <iostream>  
#include <set> 

using std::set;
using std::cout;

void printList(const set<int>& flist)
{
	for (auto elem : flist) {
		cout << elem << ' ';
	}
	cout << std::endl;
}

int main()
{
	set<int> st;

	st.insert(1);
	st.insert(2);
	st.insert(3);
	st.insert(4);
	st.insert(5);

	printList(st);

	return 0;
}

/*
run:

1 2 3 4 5

*/

 

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Answer 2

#include <iostream>  
#include <set> 

using std::set;
using std::cout;

void printList(const set<int>& flist)
{
	for (auto elem : flist) {
		cout << elem << ' ';
	}
	cout << std::endl;
}

int main()
{
	set<int> st = { 1, 2, 3, 4, 5 };

	printList(st);

	return 0;
}

/*
run:

1 2 3 4 5

*/

 

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Answer 3

#include <iostream>  
#include <set> 

using std::set;
using std::cout;
using std::endl;

void printList(const set<int>& flist)
{
	for (auto elem : flist) {
		cout << elem << ' ';
	}
	cout << endl;
}

int main()
{
	set<int> st;

	for (int i = 1; i < 7; i++) st.insert(i * 2);

	printList(st);

	return 0;
}

/*
run:

2 4 6 8 10 12

*/

 

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