#include <iostream>
#include <vector>
#include <string>
using namespace std;
 
 
int main()
{
    vector<vector<char>> vset;
    vector<char> element;
    vset.resize(255);
    element.push_back('a');
    element.push_back('b');
    element.push_back('c');
    vset['A'] = element;
    element[0] = 'e';
    element[1] = 'e';
    element[2] = 'f';
    vset['B'] = element;
 
    vector<vector<char>>::iterator it1 = vset.begin();
    for( ; it1 != vset.end(); it1++)
    {
        if( !(*it1).empty() )
        {
            vector<char>::iterator it2 = (*it1).begin();
            for( ; it2 != (*it1).end(); it2++)
            {
                cout << *it2 << " ";
            }
            cout << "\n";
        }
    }
 
 
}

#include<iostream>
#include<string>
#include<vector>
 
using namespace std;
 
class Set
{
public:
	int Menu_Screen();
	void Decision(int);
	void Create_Set(char);
	void Insert_element(char, char);
 
private:
	vector<vector<char>> list;
	vector<char> element;
};
 
int Set::Menu_Screen()
{
	int user_input;
 
	cout<<"ENTER SET OPERATION\n";
 
        cout<<"1  - Create_Set\n";
        cout<<"2  - Insert_element\n";
        cout<<"0  - EXIT\n";
        cout<<"ENTER: ";
		cin>>user_input;
 
	return user_input;
}
 
void Set::Decision(int num)
{
		char set_name;
        char element;
 
		switch(num)
		{
		case 1:
			cout<<"ENTER SET NAME: ";
			cin>>set_name;
			Create_Set(set_name);
			break;
		case 2:
			cout<<"ENTER SET NAME AND ELEMENT: ";
                cin>>set_name;
                cin>>element;
                Insert_element(element, set_name);
				break;
			case 0:
                cout<<"PROGRAM DONE\n";
                break;
		}
 
}
 
void Set::Create_Set(char set_name)
{
	list[set_name].push_back(element);
}
 
void Set::Insert_element(char ele, char Set)
{
	//find set in vector
	//then insert ele into set
}
 
 
int main()
{
	int input;
	Set start;
 
	do
	{
		input = start.Menu_Screen();
		start.Decision(input);
 
	}while(input != 0);
 
	return 0;
}