<string>

The latest version of this topic can be found at <string>.

Defines the container template class basic_string and various supporting templates.

For more information about basic_string, see basic_string Class

Syntax

#include <string>

The C++ language and the Standard C++ Library support two types of strings:

Null-terminated character arrays often referred to as C strings.
Template class objects, of type basic_string, that handle all char-like template arguments.

string	A type that describes a specialization of the template class `basic_string` with elements of type `char` as a `string`.
wstring	A type that describes a specialization of the template class `basic_string` with elements of type `wchar_t` as a `wstring`.
u16string	A type that describes a specialization of the template class `basic_string` based on elements of type `char16_t`.
u32string	A type that describes a specialization of the template class `basic_string` based on elements of type `char32_t`.

operator+	Concatenates two string objects.
operator!=	Tests if the string object on the left side of the operator is not equal to the string object on the right side.
operator==	Tests if the string object on the left side of the operator is equal to the string object on the right side.
operator<	Tests if the string object on the left side of the operator is less than to the string object on the right side.
operator<=	Tests if the string object on the left side of the operator is less than or equal to the string object on the right side.
operator<<	A template function that inserts a string into the output stream.
operator>	Tests if the string object on the left side of the operator is greater than to the string object on the right side.
operator>=	Tests if the string object on the left side of the operator is greater than or equal to the string object on the right side.
operator>>	A template function that extracts a string from the input stream.

swap	Exchanges the arrays of characters of two strings.
stod	Converts a character sequence to a `double.`
stof	Converts a character sequence to a `float`.
stoi	Converts a character sequence to an integer.
stold	Converts a character sequence to a `long double`.
stoll	Converts a character sequence to a `long long`.
stoul	Converts a character sequence to an `unsigned long`.
stoull	Converts a character sequence to an `unsigned long long`.
to_string	Converts a value to a `string`.
to_wstring	Converts a value to a wide `string`.

Extract strings from the input stream line by line.

basic_string Class	A template class that describes objects that can store a sequence of arbitrary character-like objects.
char_traits Struct	A template class that describes attributes associated with a character of type CharType

char_traits<char> Struct	A struct that is a specialization of the template struct `char_traits`<CharType> to an element of type `char`.
char_traits<wchar_t> Struct	A struct that is a specialization of the template struct `char_traits`<CharType> to an element of type `wchar_t`.
char_traits<char16_t> Struct	A struct that is a specialization of the template struct `char_traits`<CharType> to an element of type `char16_t`.
char_traits<char32_t> Struct	A struct that is a specialization of the template struct `char_traits`<CharType> to an element of type `char32_t`.