**fig3_8.txt**

/* 1*/	// An example which instantiates two integer list classes.
/* 2*/	// The main routine does some insertions, removals, and copies,
/* 3*/	// Printing the list every now and then.
/* 4*/	// Print_List uses only the public functions.


/* 5*/	#include <iostream.h>

/* 6*/	void
/* 7*/	Print_List( List<int> & L )
/* 8*/	{
/* 9*/	    if( L.Is_Empty( ) )
/*10*/	        cout << "Empty list." << endl;
/*11*/	    else
/*12*/	        for( L.First( ); !L; ++L )
/*13*/	            cout << L( ) << endl;
/*14*/	}


/* 1*/	main( )
/* 2*/	{
/* 3*/	    List<int> L1, L2;

/* 4*/	    cout << "( This should be empty )" << endl;
/* 5*/	    Print_List( L1 );

/* 6*/	    for( int i = 1; i <= 5; i++ )
/* 7*/	        L1.Insert_As_First_Element( i );
/* 8*/	    cout << "( This should be 5 4 3 2 1 )" << endl;
/* 9*/	    Print_List( L1 );

/*10*/	    for( i = 4;  i <= 6; i++ )
/*11*/	        if( L1.Find( i ) )
/*12*/	            cout << "Found " << L1( ) << endl;
/*13*/	        else
/*14*/	            cout << i << " not found." << endl;

/*15*/	    L2 = L1;
/*16*/	    cout << "( This should be 5 4 3 2 1 )" << endl;
/*17*/	    Print_List( L2 );

/*18*/	    L2.Remove( 3 );
/*19*/	    cout << "( This should be 5 4 2 1 )" << endl;
/*20*/	    Print_List( L2 );

/*21*/	    cout << "( But list L1 should be unchanged 5 4 3 2 1 )" << endl;
/*22*/	    Print_List( L1 );

/*23*/	    return 0;
/*24*/	}