static void Main(string[] args)
{
while (true)
{
SystemOfEquations SystemOfLinEquations = new SystemOfEquations();
NumericalMethods nm = new NumericalMethods();
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Console.WriteLine("Welcome to linear equation solver. ");
Console.WriteLine("To get equation, type an integer coefficients in line, separated by space.");
Console.WriteLine("When system is ready, enter END to bash.");
int step = 0;
while (true)
{
Console.Write($"Eq #{step} > ");
string entry = Console.ReadLine();
if (entry.ToLower() == "end")
{
break;
}
SystemOfLinEquations.AddEquation(new Equation(entry));
step++;
}
try
{
Console.WriteLine("We have now the system: ");
SystemOfLinEquations.PrintSystem();
Console.WriteLine("The Augmented matrix is: ");
SystemOfLinEquations.PrintAugMatrix();
Console.WriteLine("Forward Elimintation is: ");
SystemOfLinEquations.PrintElimMatrix();
Console.WriteLine("And solutions are: ");
SystemOfLinEquations.PrintSolutions();
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
continue;
}
Console.WriteLine("If you want to solve other system - press any key");
Console.WriteLine("If you want to quite - press X");
string ExitOrNot = Console.ReadLine();
if (ExitOrNot.ToLower() == "x")
{
break;
}
Console.Clear();
}
}
public void TestOfSolveLinearEquations()
{
SystemOfEquations s1 = new SystemOfEquations();
Equation eq1 = new Equation("1 2 3");
s1.AddEquation(eq1);
Equation eq2 = new Equation("4 5 6");
s1.AddEquation(eq2);
double[] solutions = s1.GetSolutions;
Assert.That(solutions, Is.EqualTo(new double[] { -1, 2 }));
}
public void TestOfPivot()
{
SystemOfEquations s1 = new SystemOfEquations();
Equation eq1 = new Equation("0 2 4");
s1.AddEquation(eq1);
Equation eq2 = new Equation("1 -3 3");
s1.AddEquation(eq2);
double[] solutions = s1.GetSolutions;
Assert.That(solutions, Is.EqualTo(new double[] { 9, 2 }));
}
public void TestOfForwardElimination()
{
SystemOfEquations s1 = new SystemOfEquations();
Equation eq1 = new Equation("1 2 3");
s1.AddEquation(eq1);
Equation eq2 = new Equation("4 5 6");
s1.AddEquation(eq2);
double[][] test = s1.GetElimMatrix;
Assert.That(test[1], Is.EqualTo(new double[] { 0, -3, -6 }));
Assert.That(test[0], Is.EqualTo(new double[] { 1, 2, 3 }));
}
