std::rename
From cppreference.com
| Defined in header <cstdio>
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int rename( const char* old_filename, const char* new_filename );
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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
| old_filename | - | pointer to a null-terminated string containing the path identifying the file to rename |
| new_filename | - | pointer to a null-terminated string containing the new path of the file |
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::filesystem::rename.
Example
Run this code
#include <cstdio>
#include <cstdlib>
#include <fstream>
#include <iostream>
int main()
{
if (!std::ofstream("from.txt").put('a')) // create and write to file
{
std::perror("Error creating from.txt");
return EXIT_FAILURE;
}
if (std::rename("from.txt", "to.txt"))
{
std::perror("Error renaming");
return EXIT_FAILURE;
}
std::cout << std::ifstream("to.txt").rdbuf() << '\n'; // print file
return EXIT_SUCCESS;
}
Output:
a
See also
(C++17) |
moves or renames a file or directory (function) |
| erases a file (function) | |
C documentation for rename
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