ASCII Chart

 

C++

Compiler support

Freestanding and hosted

Language

Standard library headers

Named requirements

Feature test macros (C++20)

Language support library

Concepts library (C++20)

Metaprogramming library (C++11)

Diagnostics library

General utilities library

Strings library

Containers library

Iterators library

Ranges library (C++20)

Algorithms library

Numerics library

Localizations library

Input/output library

Filesystem library (C++17)

Regular expressions library (C++11)

Concurrency support library (C++11)

Technical specifications

Symbols index

External libraries

 

C++ language

General topics
Preprocessor Comments	Keywords Escape sequences
Flow control
Conditional execution statements
if	switch
Iteration statements (loops)
for range-for (C++11)	while do-while
Jump statements
continue - break	goto - return
Functions
Function declaration
Lambda function expression
inline specifier
Dynamic exception specifications (until C++20)
noexcept specifier (C++11)
Exceptions
throw-expression	try-catch block
Namespaces
Namespace declaration	Namespace aliases
Types
Fundamental types Enumeration types Function types	Class/struct types Union types
Specifiers
decltype (C++11) auto (C++11) alignas (C++11)	const/volatile constexpr (C++11)
Storage duration specifiers
Initialization
Default initialization Value initialization Zero initialization Copy initialization Direct initialization	Aggregate initialization List initialization (C++11) Constant initialization Reference initialization

Expressions
Value categories Order of evaluation	Operators Operator precedence
Alternative representations
Literals
Boolean - Integer - Floating-point
Character - String - nullptr (C++11)
User-defined (C++11)
Utilities
Attributes (C++11)
Types
typedef declaration
Type alias declaration (C++11)
Casts
Implicit conversions - Explicit conversions
static_cast - dynamic_cast
const_cast - reinterpret_cast
Memory allocation
new expression	delete expression
Classes
Class declaration Constructors this pointer	Access specifiers friend specifier
Class-specific function properties
Virtual function override specifier (C++11) final specifier (C++11)	explicit (C++11) static
Special member functions
Default constructor Copy constructor Move constructor (C++11)	Copy assignment Move assignment (C++11) Destructor
Templates
Class template Function template	Template specialization Parameter packs (C++11)
Miscellaneous
Inline assembly	History of C++

 

The following chart contains all 128 ASCII decimal (dec), octal (oct), hexadecimal (hex) and character (ch) codes.

dec	oct	hex	ch		dec	oct	hex	ch		dec	oct	hex	ch		dec	oct	hex	ch
0	0	00	NUL (null)		32	40	20	(space)		64	100	40	@		96	140	60	`
1	1	01	SOH (start of header)		33	41	21	!		65	101	41	A		97	141	61	a
2	2	02	STX (start of text)		34	42	22	"		66	102	42	B		98	142	62	b
3	3	03	ETX (end of text)		35	43	23	#		67	103	43	C		99	143	63	c
4	4	04	EOT (end of transmission)		36	44	24	$		68	104	44	D		100	144	64	d
5	5	05	ENQ (enquiry)		37	45	25	%		69	105	45	E		101	145	65	e
6	6	06	ACK (acknowledge)		38	46	26	&		70	106	46	F		102	146	66	f
7	7	07	BEL (bell)		39	47	27	'		71	107	47	G		103	147	67	g
8	10	08	BS (backspace)		40	50	28	(		72	110	48	H		104	150	68	h
9	11	09	HT (horizontal tab)		41	51	29	)		73	111	49	I		105	151	69	i
10	12	0a	LF (line feed - new line)		42	52	2a	*		74	112	4a	J		106	152	6a	j
11	13	0b	VT (vertical tab)		43	53	2b	+		75	113	4b	K		107	153	6b	k
12	14	0c	FF (form feed - new page)		44	54	2c	,		76	114	4c	L		108	154	6c	l
13	15	0d	CR (carriage return)		45	55	2d	-		77	115	4d	M		109	155	6d	m
14	16	0e	SO (shift out)		46	56	2e	.		78	116	4e	N		110	156	6e	n
15	17	0f	SI (shift in)		47	57	2f	/		79	117	4f	O		111	157	6f	o
16	20	10	DLE (data link escape)		48	60	30	0		80	120	50	P		112	160	70	p
17	21	11	DC1 (device control 1)		49	61	31	1		81	121	51	Q		113	161	71	q
18	22	12	DC2 (device control 2)		50	62	32	2		82	122	52	R		114	162	72	r
19	23	13	DC3 (device control 3)		51	63	33	3		83	123	53	S		115	163	73	s
20	24	14	DC4 (device control 4)		52	64	34	4		84	124	54	T		116	164	74	t
21	25	15	NAK (negative acknowledge)		53	65	35	5		85	125	55	U		117	165	75	u
22	26	16	SYN (synchronous idle)		54	66	36	6		86	126	56	V		118	166	76	v
23	27	17	ETB (end of transmission block)		55	67	37	7		87	127	57	W		119	167	77	w
24	30	18	CAN (cancel)		56	70	38	8		88	130	58	X		120	170	78	x
25	31	19	EM (end of medium)		57	71	39	9		89	131	59	Y		121	171	79	y
26	32	1a	SUB (substitute)		58	72	3a	:		90	132	5a	Z		122	172	7a	z
27	33	1b	ESC (escape)		59	73	3b	;		91	133	5b	[		123	173	7b	{
28	34	1c	FS (file separator)		60	74	3c	<		92	134	5c	\		124	174	7c	|
29	35	1d	GS (group separator)		61	75	3d	=		93	135	5d	]		125	175	7d	}
30	36	1e	RS (record separator)		62	76	3e	>		94	136	5e	^		126	176	7e	~
31	37	1f	US (unit separator)		63	77	3f	?		95	137	5f	_		127	177	7f	DEL (delete)

Note: in Unicode, the ASCII character block is known as U+0000..U+007F Basic Latin.

Example

Run this code

#include <iostream>
int main()
{
    std::cout << "Printable ASCII [32..126]:\n";
    for (char c{' '}; c <= '~'; c++) {
        std::cout << c << ((c+1) % 32 ? ' ' : '\n');
    }
}

Possible output:

Printable ASCII [32..126]:
  ! " # $ % & ' ( ) * + , - . / 0 1 2 3 4 5 6 7 8 9 : ; < = > ?
@ A B C D E F G H I J K L M N O P Q R S T U V W X Y Z [ \ ] ^ _
` a b c d e f g h i j k l m n o p q r s t u v w x y z { | } ~