fstream Help please.

[Puggly]

I am making a program to manage a text file. I have completed the program to add text, append and then read the text file, however when it comes to the inputs, using cout <<, cin >> string, only adds 1 word and not the full line of text entered. How can I add a full line of text. I worked out getline() works for reading from the file.

  fstream file;


              file.open("WriteTextFile.txt", ios::out);

              file << UserInput << endl;

              file.close();


              cout << "Your file has now been written!\n";

[pandasd]

std::cin reads until (white)space. use std::getline(std::cin,...) there too.

[Puggly]

Can you tell me what I am doing wrong, as it still wont read input to file.

  
cout << "write a line of text\n";
            std::cin >> In;   //store input

              fstream file;  //file variable


              file.open("WriteTextFile.txt", ios::out); //open file 

              file << getline(std::cin, In);  //add string content to file

              file.close();

[AbstractionAnon]

As pandasd stated, cin >> will read only upto the first whitespace. Therefore line 3 places only up to the first whitespace into In.

Line 10: This line makes no sense. getline return a reference to an istream, so you're going to attempt to write an address to file.

Consider the following:

  string In;
  cout << "write a line of text\n";
  getline (cin, In);  // read entire line 

  fstream file;  //file variable
  file.open("WriteTextFile.txt", ios::out); //open file 
  file << In;  //add string content to file
  file.close();
 

[Puggly]

Okay so I have this code now, however it does not ask for an input. so I included cin also, but with cid it will record all the data entered apart from the first word?

cout << "write text to a text file\n";

             std::getline (std::cin, Input);   //store input in string

              fstream file;  //declare file variable


              file.open("WriteTextFile.txt", ios::out); //open file for input

              file << Input;  //add string content to file

              file.close();
 

[AbstractionAnon]

it does not ask for an input

What do you mean "it does not ask for input"?

You haven't shown a full program, but from what you've shown it appears it should ask for input.

but with cid it will record all the data entered apart from the first word?

I don't understand what you mean by "apart from the first word"?
Are you reading in the first word elsewhere? The code you've shown should read in the entire first line.

[Furjoza]

Example of reading .txt
string file is name.txt.

int ReadeWholeTxt( string file )
{
		ifstream fin( file);
		if (fin.good())
		{
			char ch;
			while (fin.get(ch)) 
				{
					cout << ch;
				}
			return 1;
		}
		else
		{
			cout << plik << " File doesnt exsist \n";
			return 0;
		}
}

Example of writing something in .txt

void Save ( )
{
	string file;
	file = "name.txt"; //Will create name.txt file
	ofstream fout(file, ios_base::out | ios_base::trunc);
	fout << "Something"; //Will put "Something" in the .txt file. Remove ios_base::trunc if you dont want to delete previously wroten things.
	fout.close();
}

Example of writing something you will write in console in .txt

void Save ( )
{
	string file;
        string text;
        cin >> text;
	file = "name.txt"; //Will create name.txt file
	ofstream fout(file, ios_base::out | ios_base::trunc);
	fout << text; //Will put "text" in the .txt file. Remove ios_base::trunc if you dont want to delete previously wroten things.
	fout.close();
}

[Puggly]

My code is very big. this is the function I am trying to get to work. I'll will try and explain what happens. I run the function and it will output both couts and not ask for an input. That is what I meant by it not asking for an input. HOWEVER when I included cin to request and input and included getline under it, it would save the text from the cin ( ALL but the first word..so I enter hi babe sup..and it saves babe sup.) I hope this is more clear?

   

{

            cout << "write text to a text file\n";

             std::getline (std::cin, Input);   //store input in string

              fstream file;  //declare file variable


              file.open("WriteTextFile.txt", ios::out); //open file for input

              file << Input;  //add string content to file

              file.close(); //close file


              cout << "Your file has now been written!\n";

              }

Thank you Furjoza. I did not ignore your post. Those are nice examples.

[AbstractionAnon]

Do you have other inputs from cin that precede this code?
It's possible there is data (such as a \n) left in the cin buffer from a previous cin operation. This would cause the getline to terminate immediately. If this is the case, use cin.ignore
http://www.cplusplus.com/reference/istream/istream/ignore/