如何改变工作目录到程序的位置 [英] how to change the working directory to the location of the program

问题描述

我想使用c ++在Mac OS上打开文件。

I want to use c++ to open a file on Mac OS.

如果我在Xcode下运行程序，工作目录与程序是一样的，这很好。但是，如果我尝试在终端运行程序，工作目录是用户/用户名。你知道如何改变工作目录到程序的位置？

If I run the program under Xcode, the working directory is the same with the program, which is fine. However, if I try to run the program in terminal, the working directory is alway "Users/username". Do you know how to change the working directory to the location of the program?

以下是示例代码：

#include <iostream>
#include <fstream>
using namespace std;
int main (int argc, const char * argv[])
{
    char * dir = getcwd(NULL, 0); 
    cout << "Current dir: " << dir << endl;

    ifstream fin("hi.txt");
    if (fin.is_open()) cout << "File is Open" << endl;
    else cout << "File is not open" << endl;    
    fin.close();
    return 0;
}

推荐答案

使用值 $（PROJECT_DIR）在您的方案调试设置的工作目录：

Use the value $(PROJECT_DIR) in the working directory in your scheme debug settings:

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