static void Main(string[] args)
{
Console.WriteLine("Nhap a:");
double a = double.Parse(Console.ReadLine());
Console.WriteLine("Nhap b:");
double b = double.Parse(Console.ReadLine());
Console.WriteLine("Nhap c:");
double c = double.Parse(Console.ReadLine());
QuadraticEquation QuadraticEquation = new QuadraticEquation(a, b, c);
Console.WriteLine(QuadraticEquation.Getter());
Console.WriteLine("Giai phuong trinh:");
double delta = QuadraticEquation.GetDiscriminant();
if (delta > 0)
{
Console.WriteLine("x1= " + QuadraticEquation.GetRoot1(delta));
Console.WriteLine("x2= " + QuadraticEquation.GetRoot2(delta));
}
else if (delta == 0)
{
Console.WriteLine("x1=x2= " + QuadraticEquation.GetRoot1(delta));
}
else
{
Console.WriteLine("The equation has no roots");
}
Console.ReadLine();
Console.ReadKey();
}
public void TestSecondRealRoot()
{
//a=1, b=3, c=1
qe.A = 1;
qe.B = 3;
qe.C = 1;
double actualRootTwo = qe.GetRoot2();
double expectedRootTwo = (-qe.B - Math.Pow((qe.B * qe.B - 4 * qe.A * qe.A), 0.5)) / 2 * qe.A;
Assert.AreEqual(expectedRootTwo, actualRootTwo, 0.000001, "The expected second real root did not match.");
}
