Question

How to remove (delete) (erase) item from a set in C++

Answer 1

#include <iostream>  
#include <set> 

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

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

int main()
{
	set<int> st = { 1, 2, 3, 5, 6, 7 };

	st.erase(2);

	print(st);

	return 0;
}

/*
run:

1 3 5 6 7

*/

 

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Answer 2

#include <iostream>
#include <set>
#include <string>

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

int main()
{
	set<string> st;

	st.insert("c++");
	st.insert("c");
	st.insert("java");
	st.insert("php");
	st.insert("python");

	st.erase("php");

	typedef set<string>::const_iterator ci;
	for (ci it = st.begin(); it != st.end(); it++)
		cout << *it << " ";
	cout << endl;

	return 0;
}


/*
run:

c c++ java python

*/

 

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