Program C++ PERHITUNGAN RUMUS ABC

#include <iostream>
#include <stdio.h>
#include <math.h>
#include <conio.h>
using namespace std;

main ()
{
  float A, B, C,E;
  float D, x1, x2;
  cout << "Nilai A = ";
  cin >> A;
  cout << "Nilai B = ";
  cin >> B;
  cout << "Nilai C = ";
  cin >> C;
  D = (B*B) - (4*A*C);
  E = sqrt(D);
  cout << "Nilai D = "<<D << endl;
  cout << "Akar Dari D = "<<E  << endl;
  if(D > 0)
   {
   x1 = (-B+sqrt(D))/(2*A);
   x2 = (-B-sqrt(D))/(2*A);
   cout << "x1 = "<<x1 << endl;
   cout << "x2 = "<<x2 << endl;
   }
   else if (D < 0)
  {
   cout << "Nilai D < 0";
   }
   else
  {x1 = -B/2*A;
   x2 = x1;
   cout << "x1 = "<<x1 << endl;
   cout << "x2 = "<<x2 << endl;  }
   getch();
}


Outputnya :