File Operation in C++

FileOperationC++

    int writedatatoFile(){
    std::ofstream  file("c:\\demo.dat",std::ios_base::app);
    if(file.is_open()){// IF EXITS OPEN AND APPEND DATA
    string data="dummy";
        file<<dummy<<endl;
        file.close();
        return 1;
    }
    else{// Create a file
        try{
           std:"fstream nf("c:\\demo.dat",fstream::out);
        if(nf.is_open()){
            nf<<dummy<<endl;
        nf.close();
        }
        else{ 
            cout<<"ERR WHILE CREATING";
            return 0;
        }
    }
        catch(char *data){
            cerr<<data;
            return 0;
        }
        return 0;
    }  
    /* Reading a File
    std::ifstream f("c:\\train.dat");
    if(f.is_open()){
      while ( getline (f,line) ){
          cout<<line<<endl;
      }
    f.close();
    
    */