/*
   File to show compound STL containers.
*/
#include <cstdlib>
#include <ctime>
#include <iostream>
#include <vector>
#include <list>

using namespace std;

void main(){
	vector<list<int> > vl;
	srand(static_cast<int>(time(0)));
	int numlists = rand()%10+1;
	list<int> li;

	// init lists
	for(int i = 0; i < numlists; i++){
        // shoot self in foot - create memory leak
		//vl.push_back(*(new list<int>()));
		vl.push_back(li);// push a copy of li on the vector
	}

	// load lists
	for(int j = 0; j < static_cast<int>(vl.size()); j++){
		int numchain = rand()%5+1;
		for(int k = 0; k < numchain; k++){
			vl[j].push_back(rand()%100);
		}
	}

	vector<list<int> >::iterator ivl;
	list<int>::iterator il;
	for(ivl = vl.begin(); ivl != vl.end(); ivl++){
		for(il = (*ivl).begin(); il != (*ivl).end(); il++){
			cout << *il << " ";
		}
        cout << endl;
	}

}