c – Xcode应用程序不再读取文件夹中的输入应用程序存储在

#include <iostream>
#include <fstream>
#include <unistd.h>

using namespace std;

int main (int argc,const char * argv[])
{
    // argv[0] returns the full path to the program,in my case "/Users/yuchen/Library/Developer/Xcode/DerivedData/../Debug/test
    string directory(argv[0]);
    // And we want to get rid of the program name `test`
    directory = directory.substr(0,directory.find_last_of("/"));
    // Point the directory to the program directory
    chdir(directory.c_str());

    cout << "Current directory is: " << getcwd(NULL,0) << endl; // /Users/yuchen/Library/Developer/Xcode/DerivedData/../Debug/

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

    return 0;
}

另见SO和SO.希望这会有所帮助.