reading data from txt file, works in Visual Studio but fails in Xcode

Question

#include <stream>  
#include <iostream>
#include <stream>
#include <iosfwd>
#include <string>

using namespace std;

int main(int argc, const char * argv[]) {
    string op = "original";
    ifstream file;
    file.open("sample.txt");
    if(!file) {
        cout << "Error: unable to open file." << endl;
    }
    else {
        while(!file.eof()) {
            file >> op;
            cout << op << endl;
        }
    }

    file.close();
    return 0;
}

sample.txt only contains the word five

I run this code in Visual Studio and the output is

five

I run the exact same code(direct copy and paste, and data.txt is added for sure) in Xcode and what gets printed in the command line is

original

The bug I see is that

file >> op

never really worked in Xcode. WHY?

How can anything get printed? That definitely isn't valid C++. — chris, Jun 30 '14 at 01:55
Please paste **the real code** into your question. This isn't your program. — Drew Dormann, Jun 30 '14 at 01:56
`while(!file.eof()){` http://stackoverflow.com/questions/5605125/why-is-iostreameof-inside-a-loop-condition-considered-wrong — πάντα ῥεῖ, Jun 30 '14 at 01:59
txt on a mac using text edit has a different format. You are expecting ASCII, and that file is probably UTF-8 — Afonso Tsukamoto, Jun 30 '14 at 02:01
@DrewDormann This is exactly my code. I am new to C++ and Xcode. I am trying things out. — Kid_Learning_C, Jun 30 '14 at 02:37
@user3703783, No one knows what the includes are supposed to be, least of all the compiler. And `` isn't a standard header (there's `iostream`, `istream`, `ostream`, `sstream`, `strstream`, `fstream`, and maybe others). But sincerely, thanks for coming back. — chris, Jun 30 '14 at 02:40
The newest one makes the most sense. If the read fails, `op` is left unchanged (not 100% sure how well that applies to C++11 with `char *`). You never check for a successful read. — chris, Jun 30 '14 at 02:46
@chris Well, can we close it as a dupe of [Why is iostream::eof inside a loop condition considered wrong?](http://stackoverflow.com/questions/5605125/why-is-iostreameof-inside-a-loop-condition-considered-wrong) now? — πάντα ῥεῖ, Jun 30 '14 at 02:50
@πάνταῥεῖ I have deleted the iOS :: binary , it still prints out "original" instead of "five" — Kid_Learning_C, Jun 30 '14 at 02:55
@πάνταῥεῖ I have modified the question. Please put it out of [on hold] — Kid_Learning_C, Jun 30 '14 at 15:09
@DrewDormann Could you PLEASE read the question again? Please put it out of [on hold] — Kid_Learning_C, Jun 30 '14 at 15:09
You've made good edits. More importantly, πάνταῥεῖ made changes to the code so it can compile. I voted to reopen it about 30 minutes ago. Just wait. Good luck! — Drew Dormann, Jun 30 '14 at 15:12
@DrewDormann Thank you all for the editing and help! I had no idea how this works — Kid_Learning_C, Jun 30 '14 at 15:21

score 0 · Answer 1 · answered Jul 06 '14 at 06:06

Here is example of how can you get the string from text file

#include <fstream>

std::string getDataFromFile(std::string filepath)
{
   ifstream fin;


   std::ifstream file(filepath);
   std::string temp;
   stringstream fileData("");
   while(std::getline(file, temp)) {
       fileData << temp << "\r\n";
   }
   file.close();

   return fileData.str();

}

score -2 · Answer 2 · edited Jun 30 '14 at 02:34

-2

In the cout statement on line 20 (cout << op << "haha" << endl;) the text saying << "haha" must be deleted. Or if your intended output should equal this:

five
haha

Try doing this:

cout << op << endl <<"haha";

I do find this a simple to answer question though. I am so sorry my answer did not output correctly :(.

edited Jun 30 '14 at 02:34

πάντα ῥεῖ

1
13
116
190

answered Jun 30 '14 at 02:31

user3750687

7
5

2

I don't see how this should fix the problem stated in the question? – πάντα ῥεῖ Jun 30 '14 at 02:37
Thanks I corrected my code. The thing that really bothers me is that ""file >> op" never worked. no string is ever loaded into op. Why is this? – Kid_Learning_C Jun 30 '14 at 02:38
@πάνταῥεῖ really sorry! I am also new to stackoverflow. Now it is changed – Kid_Learning_C Jun 30 '14 at 02:44

reading data from txt file, works in Visual Studio but fails in Xcode

2 Answers2