std::rename

int rename( const char *old_filename, const char *new_filename );

Changes the filename of a file. The file is identified by character string pointed to by old_filename. The new filename is identified by character string pointed to by new_filename.

If new_filename exists, the behavior is implementation-defined.

Parameters

Return value

​0​ upon success or non-zero value on error.

Notes

POSIX specifies many additional details on the semantics of this function, which are reproduced in C++ by std::experimental::filesystem::rename.

Example

#include <iostream>
#include <fstream>
#include <cstdio>
int main()
{
    bool ok = std::ofstream("from.txt").put('a'); // create and write to file
    if(!ok) { std::perror("Error creating from.txt"); return 1; }
 
    int rc = std::rename("from.txt", "to.txt"); 
    if(rc) { std::perror("Error renaming"); return 1; }
 
    std::cout << std::ifstream("to.txt").rdbuf() << '\n'; // print file
}

a

See also