Re: [Dev-C++] read numeric data in C++

[Jeremy H. <jer...@co...>]

Well, for C++ (as stated in the subject), this code works:

Code:
-----------------------------------------------
#include <iostream> //for basic C++ stuff
#include <sstream> //for stringstream
#include <fstream> //for ifstream
using namespace std;

int main()
{
   int i;
   ifstream fin("file.txt");
   stringstream istr;
   string holder;
     if (!fin)
   {
       cerr << "The world has ended! Abort!" << endl;
       exit(1);
   }

   while (fin >> holder)
   {
       istr << holder;
       istr >> i;
       cout << holder << "/" << i << endl;
       istr.clear(); //stringstreams suck, you have to do
                     //this to get it to work properly.
   }
};
----------------------------------------------
Where file.txt contains:
10
20
30
40
50
60
70
80
90
100

Incidently, anyone want to take a crack at why I have to clear the 
string of the stringstream for it to work properly?  If I don't, I get 
this:
10/10
20/10
30/10
40/10
50/10
60/10
70/10
80/10
90/10
100/10

-- Jeremy


Johan Parmler wrote:

> Hello
>  
> I am a new user of C and I need to load and save numeric data from and 
> to an ascii file.
>  
> Does someone have an example or any tips to make this?
>  
> Johan parmler
>