A String is a sequence of characters. The standard string class provides interface similar to standard byte container, but adding features specifically designed to operate with strings of single-byte characters.
The string class is an instantiation of the basic_string class template that uses char (i.e., bytes) as its character type.
Syntax
typedef basic_string<char> string;
The C++ string container has a number of member functions which are listed below:
| Functions | Description |
|---|
| empty() |
Checks whether the string is empty or not. |
| length() |
Returns the length of the string in terms of bytes. |
| size() |
Returns the length of the string in terms of bytes. |
| resize() |
Changes the size of the string to a length of specified number of characters. |
| max_size() |
Returns the maximum length of the string. |
| clear() |
Clears all characters of the string. |
| capacity() |
Returns size of allocated space to the string. |
| shrink_to_fit() |
Reduces the capacity of the string equal to fit its size. |
| reserve() |
Requests to reserve the string capacity be at least enough to contain n characters. |
| Functions | Description |
|---|
| at() |
Access a character of the string. |
| operator[]() |
Access a character of the string. |
| front() |
Access first character of the string. |
| back() |
Access last character of the string. |
| Functions | Description |
|---|
| begin() |
Returns iterator pointing to the first character of the string. |
| end() |
Returns iterator pointing to the past-the-last character of the string. |
| rbegin() |
Returns reverse iterator to the last character of the string. |
| rend() |
Returns reverse iterator to the character preceding the first character of the string. |
| cbegin() |
Returns const_iterator pointing to the first character of the string. |
| cend() |
Returns const_iterator pointing to the past-the-last character of the string. |
| crbegin() |
Returns const_reverse_iterator to the last character of the string. |
| crend() |
Returns const_reverse_iterator to the character preceding the first character of the string. |
| Functions | Description |
|---|
| pop_back() |
Deletes last character of the string. |
| push_back() |
Adds a new character at the end of the string. |
| swap() |
Exchanges content of two strings. |
| Functions | Description |
|---|
| compare() |
Compares two string objects. |
| Functions | Description |
|---|
| swap() |
Exchanges content of two strings. |
