Sams Teach Yourself C++ in 21 Days

Working with Streams 619

17

11:

12: cout.setf(ios::showbase);

13: cout << “The number is “ << hex << number << endl;

14:

15: cout << “The number is “ ;

16: cout.width(10);

17: cout << hex << number << endl;

18:

19: cout << “The number is “ ;

20: cout.width(10);

21: cout.setf(ios::left);

22: cout << hex << number << endl;

23:

24: cout << “The number is “ ;

25: cout.width(10);

26: cout.setf(ios::internal);

27: cout << hex << number << endl;

28:

29: cout << “The number is “ << setw(10) << hex << number << endl;

30: return 0;

31: }

The number is 185

The number is b9

The number is 0xb9

The number is 0xb9

The number is 0xb9

The number is 0x b9

The number is:0x b9

On line 7, the constant int numberis initialized to the value 185. This is dis-

played normally on line 8.

The value is displayed again on line 10, but this time the manipulator hex is concate-

nated, causing the value to be displayed in hexadecimal as b9.

OUTPUT

LISTING17.4 continued

ANALYSIS

The value bin hexadecimal represents 11. Eleven times 16 equals 176; add

the 9 for a total of 185.

NOTE

On line 12, the flag showbaseis set. This causes the prefix 0xto be added to all hexadec-

imal numbers, as reflected in the output.