为什么不创建/写入文件与fstream工作在Windows上启动？ [英] Why doesn't creating/writing to file with fstream work on windows start up?

问题描述

所以这里我有这个小程序，每个人都明白。

So here I got this little program which everyone obviously understands.

include <iostream>  
include <fstream>  
using namespace std;  

int main () {  

 ofstream myfile;  
  myfile.open ("example.txt");  
  myfile << "Writing this to a file.\n";  
  myfile.close();  
  return 0;  
}  

这个程序工作正常，但问题是，它运行在Windows启动（在注册表 SOFTWARE \\Microsoft\\Windows\\CurrentVersion\\Run ），程序开始精细，但它不创建example.txt文件。

This program works just fine, however, the problem is that if I have added it to run on windows start up(in registries SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Run), the programs starts fine, but it does not create example.txt file. Why is that and how do I avoid it?

推荐答案

它尝试在进程的当前工作目录中创建文件，因为您指定了相对路径。

It tries to create the file in the current working directory for the process, since you specified a relative path.

因为没有办法在 Windows \CurrentVersion\Run 注册表设置，工作目录继承自父进程。父进程是shell，explorer.exe的工作目录为 C：\Windows \system32 。由于（假设UAC已启用）您的用户没有该文件夹的权限，因此不会创建任何文件。

Because there is no way to specify the working directory in the Windows\CurrentVersion\Run registry setting, the working directory is inherited from the parent process. The parent process is the shell, explorer.exe which has a working directory of C:\Windows\system32. Since (assuming UAC is enabled) your user doesn't have rights to that folder, no file is created.

这篇关于为什么不创建/写入文件与fstream工作在Windows上启动？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！