The **`basic_string`** class is a generalized class that provides many functional operations on strings like searching, sorting, copying, clearing, concatenation, conversion, comparisons, and more.

The class definition and all utility functionalities are provided by `namespace std`, e.g., the `typedef` statements.
The `basic_string` class supports the following character sets:
* `char` 
* `wchar_t`


`basic_string` requires a header file:
```
#include <string>
```

# `string`
A `string` is a specialized instance of the `basic_string` class with type `char`.
```
//typedef in namespace std
typedef basic_string<char> string
```


#include <iostream>
#include <string>
using namespace std;

int main() {
  //declare a string
  string str("I love chicks"); //calling constructor
  //print string and its length
  cout<<str<<endl<<str.length()<<endl;

  //declare anothor string
  string str2=str; //assignment operator of string class
  str2+=" and goats"; //contatenation
  cout<<str2<<endl<<str2.length()<<endl;

  return 0;
}

# `wstring`
This is a specialized instance of the `basic_string` class with type `wchar_t`.
```
//typedef in namespace std
typedef basic_string<wchar_t> wstring
```

>**Note:** Type `wchar_t` commonly represents Unicode, but the standard does not specify its size and is implementation-defined. C++ 11 has also support for types `char16_t` and `char32_t`. Visit www.unicode.org for more detail on the Unicode Standard.

#include <iostream>
#include <string>

using namespace std;

int main() {
  //declare a wide character string
  wstring str(L"programming is fun");

  //declare anothor wstring
  wstring str1=(L"traveling is fun");

  //contatenation
  wstring str2= str+ L" and "+str1;

  //wcout is a output stream oriented to wide characters
  //wchar_t
  wcout<<str<<endl<<str1<<endl<<str2<<endl;
  //size of character in terms of bytes
  wcout<<sizeof(wchar_t)<<endl;

  

  return 0;
}

> Unlike `char` strings, `strings` are not necessarily null-terminated.

What is std::basic_string::basic_string in C/C++?

basic_string is a generalized class in C++ that supports various string operations and character types, like char and wchar_t.

What is std::basic_string::basic_string in C/C++?

`string`

Code

`wstring`

Code