#include <iostream>
#include <iomanip>
#include <fstream>
using namespace std;
int main() {
    //char sum = 0;
    char x;
    ifstream inFile("s1.txt");
    if (!inFile) {
        cout << "Unable to open file";
        exit(1);
    }
    while (x != '\n') {
    while (inFile >> x) {    
 
        cout<<"x = "<<x<<endl;
 
    }
    }
    inFile.close();
 
    getchar();
    return 0;
}

struct is_2b_thrown_away
{
  bool operator() ( char ch ) const
  { return !isprint(ch) || isspace(ch) || (ch==',') ; }
};

void process_file( const char* file_name )
{
    ifstream file(file_name) ;
    string line ;
    while( getline( file, line ) )
    {
       vector<char> chars ;
       remove_copy_if( line.begin(), line.end(), back_inserter(chars), 
                                      is_2b_thrown_away() ) ;
       // analyse characters in vector chars
    }
}

string line ;
while( getline( file, line ) )
{
    for (i=0; i < line.length(); i++)
    {
         if (line[i] ...)    // look at each character and process it accordingly
    }
}