# Big C++ 2nd Edition

## Bug Report Page

Page 67
Replace “Another manipulator, `setprecision`, is used to set the precision...Combining these three manipulators finally achieves the desired result:” with:

When the next value is displayed, it is padded with spaces so that the total width is 8. For example,

`cout << setw(8) << 34.95;`

yields

`⋅⋅⋅34.95`

(where each ⋅ represents a space).

When lining up currency values, you also need to control the number of digits after the decimal point. For example, you want 34.5 to display as 34.50 and 34.249997 as 34.25.

Another pair of manipulators, `fixed` and `setprecision`, is used for this purpose.

The command

`cout << fixed << setprecision(2);`

ensures that subsequent floating-point numbers are printed with two digits after the decimal point.

Combining these three manipulators achieves the desired result:

Page 100, 104, 105
Change “Selection operator” to “Conditional operator”
Page 108
In Common Error 3.2, add absolute value | | around x - y in the second equation.
Page 261
Change
```void get_name() const;
void get_age() const;```

to

```string get_name() const;
int get_age() const;```
Page 264
Change “A constructor with a weight and an x-position (the y-position is initially 0)” to “A constructor with an x-position (the y-position is initially 0)”
Page 302 Exercise P6.18
Remove “or if you are in the lower-right corner,”
Page 340 Exercise P7.17
Change
`void fill_with_values(int[] a, int size, IntFunPointer f)`

to

`void fill_with_values(int a[], int size, IntFunPointer f)`
Page 395
Before “If you want to manipulate a data set in a file,” add a paragraph

Whenever you put data to the stream, the `get` position becomes undefined. Call `seekg` when you switch back to reading. Similarly, call `seekp` when you switch from reading to writing.

Page 406 Exercise P9.9
Change “Set a variable `first` to 1, `last` to `nrecords`.” to “Set a variable `first` to 0, `last` to ```nrecords - 1```.”
Page 406 Exercise P9.10
Change `"\n"` to `'\n'`
Page 439 Exercise P10.2
Change
`Sentence greeting = new Sentence("Hello!");`

to

`Sentence greeting("Hello!");`
Page 503 Exercise P12.16
Change “just like in the standard `stack` template” to “just like in the standard `queue` template”.
Page 511
Change `tree.add` to `tree.insert` (5x)
Page 536
Add semicolons after lines 50, 57, 64, 71, 78, 85
Page 542 Exercise P13.6
Change `string smallest()` to ```string smallest() const```
Page 542 Exercise P13.9
Change `void act(string str) { }` to ```virtual void act(string str) { }```
Page 543 Exercise P13.12
Change “If the current node is the left child of the parent, move to the parent. Otherwise, go to the right child if there is one, or to the leftmost descendant of the next unvisited parent otherwise.” to “If the current node has a right child, then go to the leftmost leaf of the right child. Otherwise keep moving up to the parent until the previously traversed node is a left child.”
Page 587 Exercise P15.2
Change “Modify the conversion operator double so that it will produce the value zero in this case. Finally, add a conversion” to “Add a conversion”
Page 623
Change
`SharedString& operator=(const SharedString&);`

to

`SharedString& operator=(const SharedString& right);`
Page 640 Exercise P15.9
Remove “a Boolean field and”
Page 695 Exercse P17.2
Change `is_empty` to `empty`
Page 799 Exercise P20.2
Change “Extend the analysis to 50 consecutive push_back operations and see if the trends identified in Section 12.3 continue. Next, perform the same analysis for 12 operations, but assume the buffer has an initial capacity for 10 elements.” to “Print the average number of assignments to the buffer for 50 consecutive `push_back` operations and an initial buffer size of 0. Repeat for 12 `push_back` operations and an initial buffer size of 10.”
Page 808 Syntax 21.2
The line `decltype(`variable_name`)` variable_name `=` initial_value`;` should end in a semicolon, not a colon
Page 818
This syntax has changed considerably since the book was published. The original concepts proposal never made it into C++ 11 (the release of the C++0x standardization effort). A different version appeared in C++ 20. The example in the book can be expressed with the following syntax:
```template<typename T>
concept Addable = requires(T x, T y)
{
x + y;
};
```
You can formulate many more kinds of requirements--see this link.
Page 819 Syntax 21.10
Change
```class Box
{
public:
Box(T int) { value = init; }
private:
T value;
};```

to

```class Accumulator
{
public:
Accumulator() { result = 0; }
void add(T value) { result = result + value; }
T get_result() { return result; }
private:
T result;
};```
Page 922
In the table, swap the last two rows of the second column. The `target_function()` should be "The `*, =, ++, !=` operators" and the `adaptee_function()` "`<<, >>, fail()`".
Page 966
Change “Selection” to “Conditional operator”
Page 998
Remove (<<), (>>) and (>>>) in the captions of Figure 1.

Thanks to David Ardia, Gabriela Ernsberger, Evan Gallagher, Stephen Gilbert, Justin Glick, Russell Howes, Cindy Johnson, Kurt Schmidt, Brent Seales, Gwen Walton, René Witte, and (your name might go here) for their help!

## Bug Report Form

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