public double[] ReverseSubstitution(MatrixClass matrix)
{
int length = matrix.RecieveEquation(0).Array.Length;
double[] result = new double[matrix.Length];
for (int i = matrix.Length - 1; i >= 0; i--)
{
double val = matrix.RecieveEquation(i).Array[length - 1];
for (int x = length - 2; x > i - 1; x--)
{
if (result.Length <= x || matrix.RecieveEquation(i).Array.Length <= x)
{
break;
}
val -= matrix.RecieveEquation(i).Array[x] * result[x];
}
result[i] = val / matrix.RecieveEquation(i).Array[i];
if (!Confirmation(result[i]))
{
throw new Exception("Can not calculate this");
}
}
return(result);
}
private bool PivotProcedure(MatrixClass matrix, int row, int column)
{
bool swapped = false;
for (int z = matrix.Length - 1; z > row; z--)
{
if (matrix.RecieveEquation(z).Array[row] != 0)
{
_ = new double[matrix.RecieveEquation(0).Array.Length];
double[] temp = matrix.RecieveEquation(z).Array;
matrix.LayoutOfEquation(z, matrix.RecieveEquation(column));
matrix.LayoutOfEquation(column, new LinearEquationClass(temp));
swapped = true;
}
}
return(swapped);
}
private static void Main(string[] args)
{
if (args is null)
{
throw new ArgumentNullException(nameof(args));
}
MainProgram();
void MainProgram()
{
Console.WriteLine("Type linear equations in augmented matrix notation: a1 a2... aN d,\n where a1..N are coefficients and D is constant\n Type 'END' or 'end' or 'done'when you finish typing the equation");
int index = 1;
Matrix = new MatrixClass();
try
{
while (true)
{
Console.Write($"Eq #{index++}: ");
String input = Console.ReadLine();
if (input.Trim() == "END" || input.Trim() == "end" || input.Trim() == "done")
{
break;
}
Matrix.JoinEquation(new LinearEquationClass(input));
}
Console.WriteLine("You have entered following equations:");
for (int i = 0; i < Matrix.Length; i++)
{
Console.Write($"Eq #{i}: {Matrix.RecieveEquation(i)}\n");
}
Console.WriteLine("Result is:");
Matrix.ShowResults();
}
catch (Exception e)
{
Console.WriteLine("Error occured: " + e.Message);
}
LoopOfMainProgram();
}
void LoopOfMainProgram()
{
while (true)
{
Console.WriteLine("--------------------------------------");
Console.WriteLine("Do you want to calculate another Equation? \n Type 'yes' or 'no'");
string answer = Console.ReadLine();
if (answer == "yes")
{
Console.Clear();
MainProgram();
break;
}
else if (answer == "no")
{
Environment.Exit(0);
break;
}
else
{
Console.WriteLine("Wrong answer");
}
}
}
}
