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++?

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   

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

`string`

Code

`wstring`

Code