//New Main Menu with file,Alg& sensitivity ananlysis selection
public static void Menu()
{
GetInputAndOutputFiles();
//TODO Move this to different place
#region Stuff to Move
List <String> unformatedLP = FileHandler.ReadLP();
foreach (var item in unformatedLP)
{
Console.WriteLine(item);
}
#endregion
bool done = false;
do
{
try
{
Console.WriteLine(@"
IP SOLVER
________________________________________________________
PLEASE SELECT AN ALGORITHM
1.PRIMAL
2.TWO PHASE
3.DUAL
4.BRANCH & BOUND
5.CUTTING PLANE
");
int userinput = int.Parse(Console.ReadLine());
Algorithm menu = (Algorithm)userinput;
switch (menu)
{
case Algorithm.Primal:
linearProgram = new LpFormatter(unformatedLP, Algorithm.Primal).GetLinearProgram();
linearProgram.DisplayCanonicalForm();
PrimalSimplex simplex = new PrimalSimplex(linearProgram);
linearProgram = simplex.Solve();
break;
case Algorithm.TwoPhase:
linearProgram = new LpFormatter(unformatedLP, Algorithm.TwoPhase).GetLinearProgram();
linearProgram.IsTwoPhase = true;
TwoPhase twoPhase = new TwoPhase(linearProgram);
linearProgram.DisplayCanonicalForm();
linearProgram = twoPhase.Solve();
break;
case Algorithm.Dual:
linearProgram = new LpFormatter(unformatedLP, Algorithm.Dual).GetLinearProgram();
linearProgram.DisplayCanonicalForm();
Dual dual = new Dual(linearProgram);
linearProgram = dual.Solve();
break;
case Algorithm.BranchAndBound:
linearProgram = new LpFormatter(unformatedLP, Algorithm.Dual).GetLinearProgram();
linearProgram.DisplayCanonicalForm();
Dual bbDual = new Dual(linearProgram);
linearProgram = bbDual.Solve();
BranchAndBound BB = new BranchAndBound(linearProgram);
linearProgram = BB.Solve();
break;
case Algorithm.CuttingPlane:
linearProgram = new LpFormatter(unformatedLP, Algorithm.Dual).GetLinearProgram();
linearProgram.DisplayCanonicalForm();
Dual cutDual = new Dual(linearProgram);
linearProgram = cutDual.Solve();
CuttingPlane cutingPlane = new CuttingPlane(linearProgram);
linearProgram = cutingPlane.Solve();
break;
default:
break;
}
//todo check for input errors, set done to false if there arent any
done = true;
}
catch (FormatException)
{
done = false;
Console.WriteLine("Invalid Input");
}
} while (!done);
if (LpTools.CheckIfIPIsSolved(linearProgram))
{
linearProgram.DisplaySolution();
}
else
{
Console.WriteLine("No Solution!");
Console.ReadKey();
}
Console.Clear();
if (LpTools.CheckIfIPIsSolved(linearProgram))
{
do
{
SensitivityAnalysisMenu();
} while (true);
}
}
//TODO Check if anything from here can be added into the new menu
public static void GetInputAndOutputFiles()
{
bool isValid = false;
//Creates the directory if it doesnt exist
if (!FileHandler.DirectoryExists)
{
//Creates the directory
FileHandler.CreateDirectory();
Console.WriteLine("A folder called 'Linear Program Solver' has been created in My Documents, please place your files here" +
"\n" +
"\nPress any key to continue");
Console.ReadKey();
Console.Clear();
}
do
{
//Displys the menu
Console.WriteLine("Enter the location of your input and output files which need to be processed inside the 'Linear Program Solver' folder the is located in My Documents" +
"\nEnter the command in the following format:" +
"\n" +
"\nSolve <input file> <output file> - Note, the files must be in the format .txt, and the file extension must NOT be added" +
"\nE.g. Solve <input> <output>");
string userCommand = Console.ReadLine();
string[] splitCommand = userCommand.Split(' ');
//Makes sure the user enters correct data
if (splitCommand[0].ToLower() != "solve" || splitCommand.Length != 3)
{
Console.WriteLine("The command you entered is incorrect!" +
"\nEnter the command in the following format:" +
"\nSolve <input file> <output file>");
}
else
{
char[] notAllowed = { '<', '>', '/', '\\', ':', '*', '?', '"', '|' };
//Removes invalid characters from the file names
splitCommand[1] = splitCommand[1].Trim(notAllowed);
splitCommand[2] = splitCommand[2].Trim(notAllowed);
//Checks if the input file is found
bool fileFound = FileHandler.CheckInputFile(splitCommand[1]);
//Gives error if not found
if (!fileFound)
{
Console.WriteLine("The input file you listed cannot be found. Please ensure that:" +
"\n\tThe name is spelt correctly" +
"\n\tThe command is in the correct format" +
"\n\tThat the file does NOT include the file extension" +
"\n\tThat the file is a textfile(.txt)" +
"\n\tThat the file is located in the 'Linear Program Solver' folder in My Documents");
}
else
{
//Creates the output file
FileHandler.SetOutputFile = splitCommand[2];
Console.WriteLine("Output file created, this is where you will find the solution saved");
isValid = true;
}
}
Console.WriteLine("\nPress any key to continue...");
Console.ReadKey();
Console.Clear();
} while (!isValid);
}
public void DisplaySolution()
{
double[] answers = GetBasicVariables();
double zValue = answers[0];
Console.WriteLine("Optimal Solutions\n-----------------\nZ = + " + zValue);
int countAnswers = 1;
//Displays the X's
for (int i = 0; i < CountX; i++)
{
bool isY = false;
foreach (var item in ColY)
{
if (item + 1 == i)
{
isY = true;
}
}
if (isY == true)
{
Console.WriteLine("X" + (i + 1) + " = " + answers[countAnswers] * -1);
}
else
{
Console.WriteLine("X" + (i + 1) + " = " + answers[countAnswers]);
}
countAnswers++;
}
//Displaye the S's
for (int i = 0; i < CountS; i++)
{
Console.WriteLine("S" + (i + 1) + " = " + answers[countAnswers]);
countAnswers++;
}
//Displaye the E's
for (int i = 0; i < CountE; i++)
{
Console.WriteLine("E" + (i + 1) + " = " + answers[countAnswers]);
countAnswers++;
}
//Displaye the A's
for (int i = 0; i < CountA; i++)
{
Console.WriteLine("A" + (i + 1) + " = " + answers[countAnswers]);
countAnswers++;
}
Console.WriteLine();
//Calls the method that saves the soution
FileHandler.SaveSolution(zValue, answers);
Console.WriteLine("The solution has been saved!");
//Checks if it can draw a graph
if (CountX == 2)
{
//Draws graph
UserInterfaceHandler.Graph();
}
else
{
Console.WriteLine("This LP has more than two variables, cannot draw this graph");
}
Console.ReadKey();
}