coding wont read the file

shatred · #1 02-Dec-2006, 13:02

hi n tq dave ,...ive resolved the problem wif the header...

one question
my program should read string from file and the file named example.txt in folder test in bcc55 directory in c.
but why it doesnt read the file n im sure the coding was right....
hope u guys can help and the example.txt file only containe word hi...
the result show unable to open file

CPP / C++ / C Code:

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

int main () {
  string line;
  ifstream myfile ("c:\bcc55\test\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;
}

in what way must i keep the output file?

WaltP · #2 02-Dec-2006, 13:42

Works for me. Are you sure the file exists where you are specifying?

Also, please use proper English. Many people here don't speak short-talk or whatever that is.

And Guidelines #1 shows the proper use of code tags.

davekw7x · #3 02-Dec-2006, 14:12

Quote:

Originally Posted by shatred

my program should read string from file and the file named example.txt in folder test in bcc55 directory in c.
but why it doesnt read the file n im sure the coding was right....

Well, it is not right (and the proof is that it doesn't work the way you expected). The file name inside the string literal can be done two ways:

CPP / C++ / C Code:

  ifstream myfile ("c:\\bcc55\\test\\example.txt");

Or

CPP / C++ / C Code:

  ifstream myfile ("c:/bcc55/test/example.txt");

Inside a string, something like "\t" is a tab character. "\b" is a backspace, etc. If you want a backslash in a string literal, then it is "\\".

However, as my second example shows, you can actually use forward slashes (Yes! Even in Windows XP! It's documented by Microsoft!).

If you want to see what Windows thought your file name was, you could try:

CPP / C++ / C Code:

    char *inname = "c:\bcc55\test\example.txt";
    cout << "inname: <" << inname << ">" << endl;
    ifstream myfile(inname);
    if (myfile.is_open()) {
        while (!myfile.eof()) {
            getline(myfile, line);
            cout << line << endl;
        }
        myfile.close();
    }

    else {
        cout << "Unable to open file <" << inname << "> for reading" <<
            endl;
    }

My output:

Code:

inname: <ccc55  estexample.txt>
Unable to open file <ccc55      estexample.txt> for reading

Regards,

Dave

WaltP · #4 02-Dec-2006, 21:02

Ahh, missed that since I edited the file name.

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