Задание 1 (12)

#include <cstdlib>
#include <iostream>
#include <fstream>
#include <cmath>

using namespace std;

int main(int argc, char *argv[])
{
    ifstream  fin( "c:\\input.txt" );
    ofstream  fout( "c:\\output.txt" );
    double a,b,c,d;
    fin >> a >> b >> c;
         d = b*b-4*a*c;
         if (d>0) {
             double x1 = ( -b+sqrt(d)/(2*a) );
             double x2 = (  -b-sqrt(d)/(2*a) );
             fout << x1 << "  " << x2 << endl;
         }
         if (d==0) {
             double x = -b/(2*a);
             fout << x << endl;
              }
           else {
             fout << "No salution " << endl;
              }
    fin.close();
    fout.close();
    system("PAUSE");
    return EXIT_SUCCESS;
}