#include <iostream>
#include<iomanip>
#include<sstream>
#include<fstream>
using namespace std;

int main(void) {
     ostringstream out;
         char ch='y';
        ofstream fp;
        string data;
        float a,b,c;
         try { 
                 fp.open("test.cvs" ,ios::trunc);
                 while (ch!='n') {
                     cout<< "δωσε α=" ;
                     cin>> a;
                     cout<< "δωσε β=" ;
                     cin>> b;
                     cout<< "δωσε c=";
                     cin>> c;
                     out << a <<","<< b <<","<< c ;
                     data=out.str();
                     fp<< data <<endl;
                     cout << "write another record[y]n]?:";
                     cin>> ch;
                 }
                 fp.close();
           }catch(...) {
                 cerr<<"error writing file" <<endl;
            }
return 0; 
}