Barcodereader-pgmfile

#include <iostream>
#include <fstream>
#include <string>
#include <stdlib.h>
using namespace std;
class PGM{
    private:
        int width;
        int** data;
        int height;
        int baseline;
        bool binopen(ifstream& file_h,string filename){
            int pos =file_h.tellg();
            ifstream file;
            file.open(filename.c_str(),ios::binary);
            file.seekg(pos);
            data = new int*[height];
            for(int y = 0; y< height;y++){
                data[y] = new int[width];
                for(int x = 0; x< width; x++){
                    char buff[2];
                    file.read(buff,1);
                    if((int)buff[0]<0)
                        data[y][x]=(int)buff[0]+baseline+1;
                }
            }
            file.close();
        }
        bool asciiopen(ifstream & file,string filename){
        }
        bool startfile(string filename){
            bool bin;
            int dim[2];
            int x=0;
            string tmp;
            string temp = "";
            ifstream file_h;
            file_h.open(filename.c_str());
            getline(file_h,tmp);
            bin = tmp=="P5";
            getline(file_h,tmp);
            getline(file_h,tmp);
            for(int i = 0; i< tmp.length();i++){
                if(tmp[i]==' ') {
                    i++;
                    dim[x]=atoi(temp.c_str());
                    x++;
                    temp="";
                }
                temp+=tmp[i];
            }
            dim[x]=atoi(temp.c_str());
            width = dim[0];
            height = dim[1];
            getline(file_h,tmp);
            baseline=atoi(tmp.c_str());

            if(bin){
                binopen(file_h,filename);
            }else{
                asciiopen(file_h,filename);
            }
            file_h.close();
        }
    public:

        PGM(string filename){
            startfile(filename);
        }
        ~PGM(){
            for(int y = 0;y<height;y++){
                delete [] data[y];
            }
        }



};