How to convert from type (Class) to std:string?

Question

So I have an array of strings called blog[] and I'm trying to use a string from the array at position i, like:

outfile << blog[i];

But the problem is that blog[i] is of type MicroBlog (MicroBlog is a class I'm working with)

So my question is how can I convert from type MicroBlog to type string?

Here is the method I'm trying to use blog[i] in:

bool MicroBlog::SaveBlog(const string filename, const MicroBlog &AnotherMicroBlog)
{

    ofstream outfile;
    outfile.open(filename.c_str());


    num_tweets = AnotherMicroBlog.num_tweets;
    for (int i=0; i < num_tweets; i++)                 
    {


                outfile << blog[i];             
        outfile.close();
        }             




}

you'll want your MicroBlog class to have a .toString() function. — pennstatephil, May 02 '14 at 21:25
possible duplicate of [C++ equivalent of java.toString?](http://stackoverflow.com/questions/1549930/c-equivalent-of-java-tostring) — pennstatephil, May 02 '14 at 21:26
Do you want to convert it to a `std::string`, or do you want to stream it out to `outfile`? — Mooing Duck, May 02 '14 at 21:27
The canonical way is to overload operator<<. See: http://stackoverflow.com/questions/1549930/c-equivalent-of-java-tostring — jeffrey_t_b, May 02 '14 at 21:27

score 1 · Answer 1 · answered May 02 '14 at 21:25

1

You have to write your own operator ie toString() or overload <<:

 class Microblog {

     ....

     std::string toString() const { //public
          string ret = all_the_data;
          return ret;
     }
 };

And then outfile << blog[i].toString();

answered May 02 '14 at 21:25

yizzlez

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So I put that in my .h, and then what do I do to my code where I'm trying to use blog[i]? I've added my method I'm trying to use it in. – user3434233 May 02 '14 at 21:28
This? `outfile << blog[i].toString();`? – yizzlez May 02 '14 at 21:30

How to convert from type (Class) to std:string?

1 Answers1