Re: [c-prog] Re: Loop to Read Binary File

[Jos Timanta Tarigan]

I dont think im able to convert my class to use f >> byte. Maybe u should see 
the method i use. Its in the attachment. Somehow I get twice the last value 
'5'. Any got idea?

thanks in advance

ps: why cant i send a file with main.cpp attached?

--- On Thu, 10/9/08, py2akv <[EMAIL PROTECTED]> wrote:

> From: py2akv <[EMAIL PROTECTED]>
> Subject: [c-prog] Re: Loop to Read Binary File
> To: c-prog@yahoogroups.com
> Date: Thursday, October 9, 2008, 10:59 AM
> char byte;
> ifstream f("file"); 
> 
> while (1) {
> f >> byte;
> if (!f.eof()) cout << byte << '\n';
> else break;
> }
> 
> Mind the break to escape the while on eof found: no
> additional 
> iteration.
> 
> The idea is here; modify at will!
> 
> Geraldo
> 
> 
> --- In c-prog@yahoogroups.com, Jos Timanta Tarigan 
> <[EMAIL PROTECTED]> wrote:
> >
> > Hi, 
> > Im currently try to read a binary file. Im using this
> loop
> > 
> > while(!f.eof() {do.something()}
> > 
> > to do the loop. I notice that this method is nor
> recommended since 
> there will be an additional loop at the end.  How can I
> loop a binary 
> file without using this loop? What is the other way to do
> it? 
> > 
> > Thank you
> > 
> > 
> > Regards
> > 
> > Jos Timanta Tarigan
> >


      
  ----------


#include <iostream>
#include <fstream>
#include <vector>
using namespace std;

void writeToFile(ofstream &f, vector<int> &v)
{
        int type = 0;
        cout<<"Printing vector" << endl;
        for(int i = 0; i<v.size(); i++)
        {
                type = v.at(i);
                f.write(reinterpret_cast<const char *>(&type), sizeof(int));
                cout << "Write type: " << type << endl;
        }
}

void readFromFile(ifstream &f, vector<int> &v)
{
        int type;
        int i = 0;
        while(f)
        {
                f.read(reinterpret_cast<char *> (&type), sizeof(int));
                cout << "Type:" << type<< endl;
                cout << i++ << endl;
        }
}

int main() {
        
        vector<int> v;
        v.push_back(4);
        v.push_back(5);
        v.push_back(1);
        v.push_back(8);
        v.push_back(5);
        
        ofstream file;
        file.open("testV.txt");
        writeToFile(file, v);
        cout << "FIle written"<<endl;
        file.close();
        
        ifstream inFile;
        inFile.open("testV.txt");
        readFromFile(inFile, v);
        inFile.close();
        
        return 0;
}




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