问题打开文件c ++ [英] problem opening file c++

问题描述

必须是一个简单的答案，但我失去了，这里是返回一个错误的代码。我尝试了和没有开始斜线。

Must be a simple answer but I am at a loss, here is the code that is returning an error. I have tried with and without the starting slash.

我不知道完整的路径，我想它是相对的，从exe，这是相对路径。我尝试转义斜杠。

I won't know the full path, I want it to be relative from the exe, and that is the relative path. I tried escaping the slashes.

我的问题是，我得到错误打开文件当文件存在。为什么会失败？

My problem is that i get "error opening file" when the file is there. why is it failing?

  ifstream myFile("/LOGS/ex090716.txt");
  if (myFile.fail()) {cout << "Error opening file";}
  else
  {
   cout << "File opened... \n";
   //string line;
   //while( getline(myFile, line) ) {
   // cmatch results;
   // regex rx("(p|q)(=)([^ %]*)");
   // regex_search(line.c_str(), results, rx);
   // string referringWords = results[3];
   //}
   myFile.close();
  }

谢谢

推荐答案

你的问题是什么？如果你想测试文件是否打开或不使用 is_open（）。

What is your problem exactly?! if you want to test if the file is open or not use is_open().

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