std::filesystem::path:: filename

From cppreference.com
C++
Filesystem library
Classes
Functions
File types
std::filesystem::path
Constants
Member functions
Path decomposition
Non-member functions
(until C++20) (until C++20) (until C++20) (until C++20) (until C++20) (C++20)
Helper Classes
(C++26)
path filename ( ) const ;
(since C++17)

Returns the generic-format filename component of the path.

Equivalent to relative_path ( ) . empty ( ) ? path ( ) : *-- end ( ) .

Parameters

(none)

Return value

The filename identified by the path.

Exceptions

May throw implementation-defined exceptions.

Example

Run this code 
#include <filesystem>
#include <iostream>
namespace fs = std::filesystem;
 
int main()
{
    std::cout << fs::path("/foo/bar.txt").filename() << '\n'
              << fs::path("/foo/.bar").filename() << '\n'
              << fs::path("/foo/bar/").filename() << '\n'
              << fs::path("/foo/.").filename() << '\n'
              << fs::path("/foo/..").filename() << '\n'
              << fs::path(".").filename() << '\n'
              << fs::path("..").filename() << '\n'
              << fs::path("/").filename() << '\n'
              << fs::path("//host").filename() << '\n';
}

Output: 

"bar.txt"
".bar"
""
"."
".."
"."
".."
""
"host"

See also

returns the file extension path component
(public member function)
returns the stem path component (filename without the final extension)
(public member function)
replaces the last path component with another path
(public member function)
checks if the corresponding path element is not empty
(public member function)
Retrieved from " https://en.cppreference.com/mwiki/index.php?title=cpp/filesystem/path/filename&oldid=158019 "