//start id=dtor#include "bank.h"#include "account.h"Bank::~Bank() {    foreach (Account* acct, m_Accounts) {        delete acct;    }    m_Accounts.clear();}//end//start id=mainBank& Bank::operator<< (Account* acct) {   m_Accounts << acct;   return *this;   }int main(int argc, char* argv[]) {     Bank b;    Account* a1 = new Account(1, 423, "Gene Kelly");    JointAccount *a2 = new JointAccount(2, 1541, "Fred Astaire",    "Ginger Rodgers");    b << a1;    b << a2;} /* At this point, the Bank and both Accounts are destroyed. *///end