I ran this from the command line, compiled with g++. It works fine. So there's not reason to lose all hope. I find it essentially impossible that getline doesn't work when you compile something from XCode, because it's just using g++. I just started a new XCode project, command line tool, C++ stdc++. I pasted in your code. I didn't want to bother with figuring out where the pwd was, so i just changed the file path to /Users/xxx/example.txt where i created the one to test earlier. This worked fine. This is the exact code i used, with my username obscured:
Code:
// reading a text file
#include <iostream>
#include <fstream>
#include <string>
using namespace std;
int main (int argc, char *argv[]) {
string line;
ifstream myfile ("/Users/xxx/example.txt");
if (myfile.is_open())
{
while (! myfile.eof() )
{
getline (myfile,line);
cout << line << endl;
}
myfile.close();
}
else cout << "Unable to open file";
return 0;
}
Therefore, there is *something* else going on. Your file isn't there, it has a crazy format, etc. for this not to work for you. I suppose some extremely unusual build settings in XCode could cause some problem, but that is unlikely.
You first posted about 4 hours ago. If that's the amount of time it takes for you to be
...starting to lose all hope
you need to adjust your expectations and attitude if you want to continue programming. I have spent weeks smashing my head against a problem (not consecutively, of course). I would not have a job, or at least not be as successful, if 4 hours was enough to defeat my resolve. Don't worry, things will start making more sense eventually. I would REALLY recommend dropping down to terminal to compile and run your code. I would advise learning vi(m) to edit text, too, but understand that it may be a bit overwhelming. So grab something like TextWrangler, and hit the terminal. To compile and run something like this:
Code:
g++ -o myprog myprog.cpp
./myprog
And away you go. you know what directory you're running in, and you learn to use tools that can be used anywhere, not just OS X.
Post your exact code. Post your exact data file and it's path, and maybe we can help more.
Good luck.
-Lee
