Changes Made from the Second Printing to the Third

Chapter 7

Page

Line

Change

To

387

6-7 of Fig. 7.1

iostream.h
assert.h
Insert after line 7:

iostream
cassert
using namespace std;

397

6, 7 of Fig. 7.3

iostream.h
Insert after line 7:

iostream
using namespace std;

398

16, 19

NPOS

string::npos

402

7, 8 of Fig. 7.5

iostream.h
Insert after line 8:

iostream
using namespace std;

406

2B

Insert before this line:

#include <cmath>
using namespace std;

413

Function in middle of page

Replace with first version from p. 414.

This change along with others on pp. 413-419 results in new layouts of pages — e.g., material getting moved forward one page — so that new material on namespaces can be added on pp. 418-419.

 
char GetMenuChoice(const string & MENU, 
                   char firstChoice, char lastChoice)
{
  for (;;)
  {
    cout << MENU;
    char choice;
    cin >> choice;
    if (choice >= firstChoice && 
        choice <= lastChoice) break;
    cerr << "\nI'm sorry, but " << choice
         << " is not a valid menu choice.\n"; 
  }
  return choice; // ERROR!
}

 

Footnote

Replace

5 There are other rules that govern the scope of identifiers declared in namespaces (later in this section) and classes (see chapter 10).

415

1-2T

iostream.h
Insert after line 2:

iostream
using namespace std;

 

23B-22B

cout, and cerr in iostream.h

cout, cerr, and clog in iostream

 

19B and 11B

iostream.h
Insert after this line:

iostream
using namespace std;

 

2B

cout, and cerr

cout, cerr, and clog

416

5T

iostream.h
Insert after this line:

iostream
using namespace std;

 

10T

cout, and cerr

cout, cerr, and clog

417

17B

one final rule

the rule

419

After line 4

Insert the following new subsection on namespaces

 

Namespaces. One of the recent additions to C++ is the namespace mechanism. If name is declared or defined in a namespace declaration of the form

namespace Something
{
  // declarations and definitions
}

then the scope of name is this namespace block. It can be accessed outside of the namespace only in the following ways:

1. By its fully-qualified name Something::name

2. By its unqualified name item, if a using declaration of the form

using namespace Something::name;

or a usingdirective of the form

using namespace Something;

has already been given, provided that no other item has the same name (in which case qualification is required as described in 1.) A using directive makes all names in the namespace available. This is why we add the directive using namespace std; after #includes of standard libraries – so that the names declared and defined in them can be used without qualification

 

 

7-16

Replace code for the Sum() functions with:

both named Sum().

437

5, 6 of Fig. 7.11

iostream.h
Insert after line 6:

iostream
using namespace std;

441

6 of Fig. 7.13

iostream.h
Insert after this line:

iostream
using namespace std;

452

8 of Fig. 7.15

iostream.h
Insert after this line:

iostream
using namespace std;

 

Changes in Chapter 8