c++ - 删除 fopen 成功创建的文件时权限被拒绝

Question

这是一个函数，它从用户那里获取文件夹名称，创建一个文本文件，稍后应该将其删除。

void function(string LogFolder)
{
     fopen((LogFolder+"/test.txt").c_str(),"w");
     cout<<"The errorno of fopen "<<errno<<endl;
     remove((LogFolder+"/test.txt").c_str());
     cout<<"The errorno of remove "<<errno<<endl;
}

输出:
fopen 0的errorno【说明文件创建成功】
remove 13的errorno[表示Permission denied]

如您所见，该文件夹未被成功删除。
A link to understand error codes

Answer 1

您需要先关闭文件:

void function(string LogFolder)
{
     // Acquire file handle
     FILE* fp = fopen((LogFolder+"/test.txt").c_str(),"w");

     if(fp == NULL) // check if file creation failed
     {
          cout<<"The errorno of fopen "<<errno<<endl;
          return;
     }

     // close opened file
     if(fclose(fp) != 0)
     {
         cout<<"The errorno of fclose "<<errno<<endl;
     }


     if(remove((LogFolder+"/test.txt").c_str()) != 0)
     {
          cout<<"The errorno of remove "<<errno<<endl;
     }
}