| CARVIEW |
Select Language
HTTP/1.1 301 Moved Permanently
Server: nginx
Date: Thu, 24 Jul 2025 05:52:19 GMT
Content-Type: text/html; charset=UTF-8
Transfer-Encoding: chunked
Connection: keep-alive
Location: /reference/ios/hex/
HTTP/1.1 200 OK
Server: nginx
Date: Thu, 24 Jul 2025 05:52:19 GMT
Content-Type: text/html; charset=utf-8
Transfer-Encoding: chunked
Connection: keep-alive
ETag: W/"77e9-ftOB9VxIVw4AAbhHO1cJfamjwU0"
Content-Encoding: gzip
Sets the basefield format flag for the str stream to hex.
When basefield is set to hex, integer values inserted into the stream are expressed in hexadecimal base (i.e., radix 16). For input streams, extracted values are also expected to be expressed in hexadecimal base when this flag is set.
The basefield format flag can take any of the following values (each with its own manipulator):
Notice that the basefield flag only affects the insertion/extraction of integer values (floating-point values are always interpreted in decimal base).
Notice also that no base prefix is implicitly prepended to the number unless the showbase format flag is set.
For standard streams, the basefield flag is set to dec on initialization.
Output:
Reference
C library:
- <cassert> (assert.h)
- <cctype> (ctype.h)
- <cerrno> (errno.h)
-
<cfenv> (fenv.h)C++11
- <cfloat> (float.h)
-
<cinttypes> (inttypes.h)C++11
- <ciso646> (iso646.h)
- <climits> (limits.h)
- <clocale> (locale.h)
- <cmath> (math.h)
- <csetjmp> (setjmp.h)
- <csignal> (signal.h)
- <cstdarg> (stdarg.h)
-
<cstdbool> (stdbool.h)C++11
- <cstddef> (stddef.h)
-
<cstdint> (stdint.h)C++11
- <cstdio> (stdio.h)
- <cstdlib> (stdlib.h)
- <cstring> (string.h)
-
<ctgmath> (tgmath.h)C++11
- <ctime> (time.h)
-
<cuchar> (uchar.h)C++11
- <cwchar> (wchar.h)
- <cwctype> (wctype.h)
Containers:
-
<array>C++11
- <deque>
-
<forward_list>C++11
- <list>
- <map>
- <queue>
- <set>
- <stack>
-
<unordered_map>C++11
-
<unordered_set>C++11
- <vector>
-
Input/Output:
Multi-threading:
-
<atomic>C++11
-
<condition_variable>C++11
-
<future>C++11
-
<mutex>C++11
-
<thread>C++11
-
Other:
- <algorithm>
- <bitset>
-
<chrono>C++11
-
<codecvt>C++11
- <complex>
- <exception>
- <functional>
-
<initializer_list>C++11
- <iterator>
- <limits>
- <locale>
- <memory>
- <new>
- <numeric>
-
<random>C++11
-
<ratio>C++11
-
<regex>C++11
- <stdexcept>
- <string>
-
<system_error>C++11
-
<tuple>C++11
-
<type_traits>C++11
-
<typeindex>C++11
- <typeinfo>
- <utility>
- <valarray>
<ios>
types
manipulators
other functions
-
iostream_categoryC++11
-
function
<ios> <iostream>
std::hex
ios_base& hex (ios_base& str);
Use hexadecimal base
When basefield is set to hex, integer values inserted into the stream are expressed in hexadecimal base (i.e., radix 16). For input streams, extracted values are also expected to be expressed in hexadecimal base when this flag is set.
The basefield format flag can take any of the following values (each with its own manipulator):
| flag value | effect when set |
|---|---|
| dec | read/write integer values using decimal base format. |
| hex | read/write integer values using hexadecimal base format. |
| oct | read/write integer values using octal base format. |
Notice that the basefield flag only affects the insertion/extraction of integer values (floating-point values are always interpreted in decimal base).
Notice also that no base prefix is implicitly prepended to the number unless the showbase format flag is set.
For standard streams, the basefield flag is set to dec on initialization.
Parameters
- str
- Stream object whose basefield format flag is affected.
Because this function is a manipulator, it is designed to be used alone with no arguments in conjunction with the insertion (<<) and extraction (>>) operations on streams (see example below).
Return Value
Argument str.Example
|
|
Output:
70 46 106 |
Data races
Modifies str. Concurrent access to the same stream object may cause data races.Exception safety
Basic guarantee: if an exception is thrown, str is in a valid state.See also
- dec
- Use decimal base (function)
- oct
- Use octal base (function)
- ios_base::flags
- Get/set format flags (public member function)
- ios_base::setf
- Set specific format flags (public member function)
Home page | Privacy policy
© cplusplus.com, 2000-2025 - All rights reserved - v3.3.4s
Spotted an error? contact us
© cplusplus.com, 2000-2025 - All rights reserved - v3.3.4s
Spotted an error? contact us