代码运行完美在g ++，但不是在Xcode - 找不到文件 [英] Code runs perfect in g++ but not in Xcode - Cannot find File

问题描述

我创建了一个包含内容的文本文件。它位于与cpp文件相同的文件夹中。我已经确认几次该文件存在。当我运行g ++，编译运行它找到文件。当我在Xcode中运行它，它不工作。如果找不到该文件。

I have created a text file with content. It is located in the same folder as the cpp files. And I have confirmed several times that the file exists. When I run g++, compile and run it finds the file. When I run it in Xcode, it does not work. If fails to find the file.

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

int main () {
  string line;
  ifstream myfile ("example.txt");
  if (myfile.is_open())
  {
    while ( myfile.good() )
    {
      getline (myfile,line);
      cout << line << endl;
    }
    myfile.close();
  }

  else cout << "Unable to open file"; 

  return 0;
}

推荐答案

XCode从IDE在默认的 build 位置启动，它实际上是磁盘某处的临时目录。如果您希望在启动时将工作目录更改为其他文件（例如您的文件所在的位置）：

Your file fails to open because XCode launches from the IDE in the default build location, which is actually a temporary directory off somewhere on your disk. If you want change the working directory at launch-time to something else (like the location where your files can be found):

选择运行模式。

2. 在底部选项选项卡应为工作目录选项。选中复选框并将自定义工作目录设置为知道（您的/ Users / yourname主目录是我使用的一个不错的地方）。


3. 请确保您在IDE中执行程序所需的任何当前目录数据文件都在此目录中。

1. Select the Product/Edit Scheme... menu option.
2. Select the Run schema in the left list.
3. At the bottom Options tab on the right pane should be a "Working Directory" option. Check the checkbox and set the custom working directory to someplace you know (your "/Users/yourname" home directory is a decent place that I use).
4. Make sure any "current directory" data files you need for your program execution from the IDE are in this directory.

没有看到它，这也是您可以配置同一对话框的命令行参数（在另一个选项卡上）。

And in case you didn't see it, this is also the place where you can configure command-line arguments (on another tab) of the same dialog.

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