Another Question Dealing With I/O.

For some reason my ofstream command isn't working, I can't run my program

Code:

---

#include <iostream>
#include <fstream>

int Main()
{
ofstream a_file ("C:\users\jason\excess\testfile.txt");

      }

---

I keep getting these errors, which I don't understand

Line 6: 'ofsteam' undeclared (first use this function)

Line 6: expected ';' before 'a_file'

Lines 6:18 incomplete universal character name \u


and one warning

6:18 unknown escape sequence '\i'

is it "ofstream" or "ofsteam" (the latter missing the "r")?

--
Mats

Quote:

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Originally Posted by matsp

is it "ofstream" or "ofsteam" (the latter missing the "r")?

--
Mats

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I didn't misspell, trust me that was the first thing I checked, the tutorial reference that I am using has ofstream, i'll go and check to make sure that is the right command

Fine, but in your error message it is missing the r, but in your code-sample it is not. And it is the typical thing we see very often here - someone is typing in part new code into the site, and quoting errors that belong to some OTHER code ...

--
Mats

Quote:

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Originally Posted by matsp

Fine, but in your error message it is missing the r, but in your code-sample it is not. And it is the typical thing we see very often here - someone is typing in part new code into the site, and quoting errors that belong to some OTHER code ...

--
Mats

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That means I misspelled the error, but in the program my command is ofstream, spelled correctly

MY PROBLEM IS STILL UNSOLVED... If anyone can help I would appreciate it

So. There's not really an ostream. There is an std::ostream, though.

Quote:

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Originally Posted by tabstop

So. There's not really an ostream. There is an std::ostream, though.

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I'm sorry, but I have no idea what you just said, however I did just discover that even if I slightly alter the tutorial, it still does not work.

Code:

---

#include <fstream>
#include <iostream>

using namespace std;

int main()
{
  char str[10];

  //Creates an instance of ofstream, and opens example.txt
  ofstream a_file ( "c:\users\Jason\Excess\example.txt" );
  // Outputs to example.txt through a_file
  a_file<<"This text will now be inside of example.txt";
  // Close the file stream explicitly
  a_file.close();
  //Opens for reading the file
  ifstream b_file ( "c:\users\Jason\Excess\example.txt" );
  //Reads one string from the file
  b_file>> str;
  //Should output 'this'
  cout<< str <<"\n";
  cin.get();    // wait for a keypress
  // b_file is closed implicitly here
}

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1. You need to include <fstream>
2. You need to escape your backslashes.

Quote:

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Originally Posted by brewbuck

1. You need to include <fstream>
2. You need to escape your backslashes.

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I did include <fstream>, but I don't understand what you mean by escape your backlashes.

Quote:

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Originally Posted by The7thCrest

I did include <fstream>, but I don't understand what you mean by escape your backlashes.

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Instead of:

Code:

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"C:\users\jason\excess\testfile.txt"

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You need:

Code:

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"C:\\users\\jason\\excess\\testfile.txt"

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Remember the string escapes. '\n' is newline. '\t' is tab -- you have a '\t' in your string. You need to escape the backslashes.

I understand that I need double slashes now, but I still don't understand the explanation of how or why I do.

Quote:

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Originally Posted by The7thCrest

I understand that I need double slashes now, but I still don't understand the explanation of how or why I do.

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In your own example you use '\n' -- are you saying you don't know what that is?

I didn't use /n anywhere, in my text or my code, however I do know that '/n' is a new line tag. Like

Code:

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cout<<("Hello World \n")

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says output to the screen and then move to the nest line

Quote:

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Originally Posted by The7thCrest

I didn't use /n anywhere, in my text or my code, however I do know that '/n' is a new line tag. Like

Code:

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cout<<("Hello World \n")

---

says output to the screen and then move to the nest line

---

And "\t" means a tab character. Look carefully at your string.

Quote:

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Originally Posted by The7thCrest

I didn't use /n anywhere, in my text or my code, however I do know that '/n' is a new line tag. Like

Code:

---

cout<<("Hello World \n")

---

says output to the screen and then move to the nest line

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You'll have to pay a bit more attention to / and \.

Quote:

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Originally Posted by brewbuck

And "\t" means a tab character. Look carefully at your string.

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OH- See -_-