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std::rename

STD：：改名

Defined in header ​​
int rename( const char *old_filename, const char *new_filename ​​

更改文件的文件名。所指向的字符串标识该文件。old_filename。新文件名由指向的字符串标识。new_filename...

如果new_filename存在时，行为是实现定义的。

参数

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

返回值

​0​如果成功或错误值为非零。

注记

POSIX指定有关此函数的语义的许多附加细节，这些信息在C++中由std：：实验性：：文件系统：：重命名...

例

二次

#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
}

二次

产出：

二次

a

二次

另见

rename (C++17)moves or renames a file or directory (function)
removeerases a file (function)

C重命名文件

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