#include "Date_OS.h" int main() { Date d[10] = {Date(2,12,1949), Date(4,20,1949), Date(3,15,1949), Date(11,6,1986), Date(7, 4,1996), Date(2,12,1959), Date(4,20,1959), Date(3,15,1959), Date(11,7,1986), Date(7, 3,1996)}; Date_OS mydates; // enter 10 dates for ( int i=0; i < 10; i++) mydates.enter(d+i); for (i=0; idisplay(); cout << "\n"; // display date list } i = mydates.index(d+6); mydates.remove(i); cout << "\nEntry " << i << " removed\n"; i = mydates.index(d+6); // access should fail (d+6)->display(); if ( i == -1 ) cout << " entry not found\n"; }