[C++]Simple log class

[Mindblaster7]

In my try to teach myself C++, I thought it would be helpful for me to have a functioning logging class for future "projects". This was written on my Windows box, in VC++ 2010.

I wanted to share this to others for use and to get tips for optimization and such.

I wrote the class in a file called "log.h":

#include <iostream>
#include <fstream>
using namespace std;
class Log_Module {
public:
        void init(string filename) {
        if (!out.is_open()) {
            out.open(filename);
            file_name = filename;
        }
        else
            cout << "There were already an open log file." << endl;
    }
    template <typename T>
    void log(T log_this){
        if (out.is_open() && out.good())
            out << log_this << endl;
        else {
            int var = 1;
            while(!out.is_open()) {
                if (!file_name.length() > 0)
                    break;
                if (var <= 10)
                    out.open(file_name);
                else
                    break;

                ++var;
            }
            if (!out.is_open())
                cout << "The log file could not be opened." << endl;
            else
                log( log_this );
        }
    }
    void log_close(){
        out.close();
    }
private:
    ofstream out;
    string file_name;
}; 

And heres a little example:

#include "log.h"

int main() {
    Log_Module l;
    l.init("C:\\Users\\Andreas\\Desktop\\log_out.txt");
    l.log("Log a string.");
    l.log(0x33FEE);
    l.log(new signed int);
    l.log(new unsigned int);
    l.log((bool) true);
    l.log((double) 20.22);
    l.log_close();
} 

Output:

Log a string.
212974
002D5250
002D63F0
1
20.22

[MentaL]

[iceman4154]

Well I know it will still work regardless but shouldn't your class have a constructor whether it takes arguments or not? Also, another note I find it a lot easy to keep track of classes when I use a header or .h file for the definition of the class and a .cpp file for the actual declaration or main code to the class. Just a thought, feel free to discuss your differences in thought or ask any questions.