Escape sequences
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Las secuencias de escape se utilizan para definir ciertos caracteres especiales dentro de literales de cadena .
Original:
Escape sequences are used to define certain special characters within string literals.
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Las secuencias de escape están disponibles los siguientes:
Original:
The following escape sequences are available:
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| Escape sequence |
Description | Representation |
|---|---|---|
\'
|
single quote | byte 0x27
|
\"
|
double quote | byte 0x22
|
\?
|
question mark | byte 0x3f
|
\\
|
backslash | byte 0x5c
|
\0
|
null character | byte 0x00
|
\a
|
audible bell | byte 0x07
|
\b
|
backspace | byte 0x08
|
\f
|
form feed - new page | byte 0x0c
|
\n
|
line feed - new line | byte 0x0a
|
\r
|
carriage return | byte 0x0d
|
\t
|
horizontal tab | byte 0x09
|
\v
|
vertical tab | byte 0x0b
|
\nnn
|
arbitrary octal value | byte nnn
|
\xnn
|
arbitrary hexadecimal value | byte nn
|
\u
|
arbitrary Unicode value. May result in several characters. |
code point U+nnnn
|
\U
|
arbitrary Unicode value. May result in several characters. |
code point U+nnnnnnnn
|
[editar] Notas
El
\n carácter de nueva línea tiene un significado especial cuando se utiliza en modo de texto de E / S, que se convierte en la nueva línea byte sistema operativo específico o secuencia de bytes .Original:
The new-line character
\n has special meaning when used in text mode I/O, it is converted to the OS-specific newline byte or byte sequence.The text has been machine-translated via Google Translate.
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Secuencias de escape octales tienen un límite de tres dígitos octales, pero terminan en el primer carácter que no es un dígito octal válido si se encuentra antes .
Original:
Octal escape sequences have a limit of three octal digits, but terminate at the first character that is not a valid octal digit if encountered sooner.
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Secuencias de escape hexadecimales no tienen límite de duración y terminará en el primer carácter que no es un dígito hexadecimal válido. Si el valor representado por una secuencia de escape hexadecimal no solo no se ajusta al rango de valores representados por el tipo de caracteres utilizado en esta cadena literal (char, char16_t, char32_t o wchar_t), el resultado es indefinido .
Original:
Hexadecimal escape sequences have no length limit and terminate at the first character that is not a valid hexadecimal digit. If the value represented by a single hexadecimal escape sequence does not fit the range of values represented by the character type used in this string literal (char, char16_t, char32_t, or wchar_t), the result is unspecified.
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Un nombre de carácter universal en una cadena literal estrecha puede asignar a más de una charla debido a multibyte codificación .
Original:
A universal character name in a narrow string literal may map to more than one char due to multibyte encoding.
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El signo de interrogación escapar \? secuencia se utiliza para prevenir trigraphs se interprete dentro de literales de cadena: una cadena como "??/" se compila como "\", pero si el signo de interrogación segundo se escapó, como en "?\?/", se convierte en "??/"
Original:
The question mark escape sequence \? is used to prevent trigraphs from being interpreted inside string literals: a string such as "??/" is compiled as "\", but if the second question mark is escaped, as in "?\?/", it becomes "??/"
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[editar] Ejemplo
#include <iostream> int main() { std::printf("This\nis\na\ntest\n\nShe said, \"How are you?\"\n"); }
Output:
This is a test She said, "How are you?"
