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

class Logger {
public:
    static Logger* Instance();
    bool open(string filename);
    template<typename T>
    void write(T data) {
        file << data;
    }
    void writeChar(char data) {
        file << data;
    }
    bool close();

private:
    ofstream file;
    Logger() {};
    Logger(Logger const&) {};
    Logger& operator=(Logger const&){};
    static Logger* m_pInstance;
};