Convert separate digits into one whole number...???

[Andrea Robinson]

Hello! I need a little more help. I have managed to convert all my chars input from a text file into digits.
Example:
Input from file:
$1,9,56#%34,9
!4.23#$4,983
Output:
1956
349
423
4983
Now, I need to take those individual digits the 1 9 5 6 and make it read as a whole number. The output would look the same but they would actually be whole numbers. Make sense? I have to do this in my outer loop. It also has to be an EOF loop. So, I know I need to take the first digit and multiply it by 10 and add the next digit then multiply all that by 10 until I reach the last number. How can I write that in an efficient non-crashing way?
I attached my input .txt file if you need to see it.
This is what I have so far...

THANK YOU SOOOO MUCH!!!

/*
 */
 
 //Character Processing Algorithm
 
 #include <fstream>
 #include <iostream>
 #include <cctype>                                                                                                                         
 using namespace std;
 
 char const nwln = '\n';
 
  int main ()
   {
     ifstream data;
     ofstream out;
     char ch;
     char lastch;
     int sum;
 
     data.open ("lincoln.txt"); //file for input
     if (!data)
        {
        cout << "Error!!! Failure to Open lincoln.txt" << endl;
        system ("pause");
        return 1;
        }
     out.open ("out.txt"); //file for output
     if (!out)
        {
        cout << "Error!!! Failure to Open out.txt" << endl;
        system ("pause");
        return 1;
        }
 
     data.get (ch); // priming read for end-of-file loop
 
     while (data)
           {
           sum = 0;
           while ((ch != nwln) && data)
                 {
                 if (isdigit(ch))
                    out<<ch;
 
                 if (ch == '#')
                    out<<endl;
                 {
                 ;
                 }
 
                                  lastch = ch;
                 data.get (ch); // update for inner loop
                 } // inner loop
                 if (lastch != '#')
                     out<<endl;
 
 
 
              data.get (ch); // update for outer loop
 
           } //outer loop
 
     cout << "The End..." << endl;
     data.close (); out.close ();
     system ("pause");
     return 0;
     } //main
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

[Rabbit]

Just use the atoi function.