std::basic_string::operator[]

 

C++

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正则表达式库 （C++11）

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字符串库

null结尾的字符串 Original: Null-terminated strings The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

字节的字符串

多字节字符串

宽字符串

类 Original: Classes The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

basic_string

char_traits

 

std::basic_string

成员函数 Original: Member functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

basic_string::basic_string

basic_string::operator=

basic_string::assign

basic_string::get_allocator

元素的访问 Original: Element access The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

basic_string::at

basic_string::operator[]

basic_string::front （C++11）

basic_string::back （C++11）

basic_string::data

basic_string::c_str

迭代器 Original: Iterators The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

basic_string::begin basic_string::cbegin （C++11）

basic_string::end basic_string::cend （C++11）

basic_string::rbegin basic_string::crbegin （C++11）

basic_string::rend basic_string::crend （C++11）

容量 Original: Capacity The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

basic_string::empty

basic_string::size

basic_string::length

basic_string::max_size

basic_string::reserve

basic_string::capacity

basic_string::shrink_to_fit （C++11）

操作 Original: Operations The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

basic_string::clear

basic_string::insert

basic_string::erase

basic_string::push_back

basic_string::pop_back （C++11）

basic_string::append

basic_string::operator+=

basic_string::compare

basic_string::replace

basic_string::substr

basic_string::copy

basic_string::resize

basic_string::swap

搜索 Original: Search The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

basic_string::find

basic_string::rfind

basic_string::find_first_of

basic_string::find_first_not_of

basic_string::find_last_of

basic_string::find_last_not_of

常量 Original: Constants The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

basic_string::npos

非成员函数 Original: Non-member functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

operator+

operator== operator!= operator< operator> operator<= operator>=

swap(std::basic_string)

operator<< operator>>

getline

stoi stol stoll （C++11） （C++11） （C++11）

stoul stoull （C++11） （C++11）

stof stod stold （C++11） （C++11） （C++11）

to_string （C++11）

to_wstring （C++11）

Helper类 Original: Helper classes The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

hash<std::string> hash<std::wstring> hash<std::u32string> hash<std::u16string> （C++11）

 

reference       operator[]( size_type pos );
const_reference operator[]( size_type pos ) const;

返回指定位置处的字符pos的参考。没有执行边界检查.

Original:

Returns a reference to the character at specified location pos. No bounds checking is performed.

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If pos==size(),

• const版本返回一个引用到的字符值CharT()（空字符）。 （至 C++11）

  Original:

  The const version returns a reference to the character with value CharT() (the null character). （至 C++11）

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• 这两个版本返回一个引用到的字符值CharT()（空字符）。修改的空字符导致未定义的行为，通过非const引用。 （C++11 起）

  Original:

  Both versions returns a reference to the character with value CharT() (the null character). Modifying the null character through non-const reference results in undefined behavior. （C++11 起）

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参数

pos

-

返回的字符位置 Original: position of the character to return The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

返回值

引用到所请求的字符

Original:

reference to the requested character

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复杂性

常数

Original:

Constant

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另请参阅

at	访问指定的字符的边界检查 Original: access specified character with bounds checking The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （公共成员函数）