public void ThreeCoefficients_shouldBeEqualTheRightDescriminant()
{
var coef = new int[] { 1, 2, 3 };
var expected = -8;
var discriminant = EquationsSolver.FindDescriminant(coef);
Assert.AreEqual(expected, discriminant);
}
public void Descriminant_shouldHaveRightTypeOfDescriminant_3()
{
int descriminant = 0;
int expected = 1;
int typeOfDesc = EquationsSolver.DescriminantValidation(descriminant);
Assert.AreEqual(typeOfDesc, expected);
}
public void QuadraticEquation_shouldBeCorrect_2()
{
string equation = "12x^2-16y-27=0";
bool expected = false;
bool validationResult = EquationsSolver.ValidationOfEquation(equation);
Assert.AreEqual(expected, validationResult);
}
static void Main(string[] args)
{
string equation;
string solveTheNextEquation = "next";
while (solveTheNextEquation.Equals("next"))
{
solveTheNextEquation = "-";
Console.Write("Введите квадратное уравнение в виде ax^2+bx+c=0 : ");
equation = Console.ReadLine();
if (EquationsSolver.ValidationOfEquation(equation))
{
int[] coefficient = EquationsSolver.ParseString(equation);
if (coefficient[0] != 0)
{
int descriminant = EquationsSolver.FindDescriminant(coefficient);
int typeOfDesc = EquationsSolver.DescriminantValidation(descriminant);
string stringAnswer = EquationsSolver.CalculatingAnswer(typeOfDesc, descriminant, coefficient);
string[] answer = EquationsSolver.OutputOfAnswer(stringAnswer);
if (typeOfDesc == 0)
{
Console.WriteLine("Нет корней.");
}
else if (typeOfDesc == 1)
{
Console.WriteLine("\nУравнение имеет два одинаковых корня : ");
}
else if (typeOfDesc == 2)
{
Console.WriteLine("\nУравнение имеет два различных корня : ");
}
if (!answer[0].Equals("_") && !answer[1].Equals("_"))
{
Console.WriteLine("\nПервый корень = " + answer[0]);
Console.WriteLine("Второй корень = " + answer[1]);
}
}
else
{
Console.WriteLine("Вы ввели не квадратное уравнение!");
}
}
else
{
Console.WriteLine("Вы ввели уравнение неверно!");
}
Console.WriteLine("\nДля решения следующего уравнения введите 'next'");
solveTheNextEquation = Console.ReadLine();
}
Console.ReadKey();
}
public void Equation_shouldBeEqualRightAnswer()
{
string equation = "4x^2+6x+2=0";
int[] coef = new int[] { 4, 6, 2 };
string expected = "-0,5 -1";
string answer = EquationsSolver.CalculatingAnswer
(EquationsSolver.DescriminantValidation(EquationsSolver.FindDescriminant(coef)),
EquationsSolver.FindDescriminant(coef), EquationsSolver.ParseString(equation));
Assert.AreEqual(expected, answer);
}
public void Equation_shouldGiveRightArguments_5()
{
string equation = "19x^2+0x-22=0";
int[] expected = { 19, 0, -22 };
int[] coef = EquationsSolver.ParseString(equation);
for (int i = 0; i < 3; i++)
{
Assert.AreEqual(expected[i], coef[i]);
}
}
public void Equation_shouldGiveRightArguments_3()
{
string equation = "2x^2+7x-0=0";
int[] expected = { 2, 7, 0 };
int[] coef = EquationsSolver.ParseString(equation);
for (int i = 0; i < 3; i++)
{
Assert.AreEqual(expected[i], coef[i]);
}
}