private void hideStateDFA1()
{
DFA2simState0.Hide();
DFA2simState1.Hide();
DFA2simState2.Hide();
DFA2simState3.Hide();
DFA2simState4.Hide();
DFA2simState5.Hide();
DFA2simState6.Hide();
DFA2simStateEndLoop.Hide();
}
private void onNext(object sender, EventArgs e)
{
sim = stringSimulation.ToCharArray(); //sim = stringSimulation.ToCharArray();
switch (lblRegex.Text)
{
#region REGEX1
case "Regular Expression: (aa+bb)(a+b)* (a+b+ab+ba) (a+b+ab+ba)* (aa+bab)* (a+b+aa) (a+b+bb)*":
if (forCTR <= stringSimulation.Length - 1)
{
if (currentState == 0)
{
DFA1simState0.Show();
//StatusBar.Text = "The string enters start state!";
currentState++;
}
else if (currentState == 1)
{
if (sim[forCTR] == 'a')
{
DFA1simState0.Hide();
DFA1simState1a.Show();
lblInputChar.Text = Convert.ToString(sim[forCTR]);
//StatusBar.Text = "Since input is a, the string enters state 1a";
forCTR++;
currentState++;
}
else if (sim[forCTR] == 'b')
{
DFA1simState0.Hide();
DFA1simState1b.Show();
lblInputChar.Text = Convert.ToString(sim[forCTR]);
//StatusBar.Text = "Since input is b, the string enters state 1b";
forCTR++;
currentState++;
}
else
{
//start state only
lblInputChar.Text = "INVALID INPUT";
//StatusBar.Text = "The string is stuck in start state, and is therefore invalid";
btnNext.Enabled = false;
}
}
else if (currentState == 2)
{
if (sim[forCTR - 1] == 'a' && sim[forCTR] == 'a')
{
DFA1simState1a.Hide();
DFA1simState2.Show();
lblInputChar.Text += Convert.ToString(sim[forCTR]);
//StatusBar.Text = "From state 1a, the input is a, therefore the string enters state 2";
forCTR++;
currentState++;
}
else if (sim[forCTR - 1] == 'b' && sim[forCTR] == 'b')
{
DFA1simState1b.Hide();
DFA1simState2.Show();
lblInputChar.Text += Convert.ToString(sim[forCTR]);
//StatusBar.Text = "From state 1b, the input is b, therefore the string enters state 2";
forCTR++;
currentState++;
}
else if (sim[forCTR - 1] == 'a' && sim[forCTR] == 'b')
{
DFA1simState1a.Hide();
DFA1simState6.Show();
lblInputChar.Text += Convert.ToString(sim[forCTR]);
//StatusBar.Text = "From state 1a, the input is b, the string enters a trap state, and therefore is considered invalid for the DFA";
lblInputChar.Text = "INVALID INPUT";
forCTR++;
currentState++;
btnNext.Enabled = false;
}
else if (sim[forCTR - 1] == 'b' && sim[forCTR] == 'a')
{
DFA1simState1b.Hide();
DFA1simState6.Show();
lblInputChar.Text += Convert.ToString(sim[forCTR]);
//StatusBar.Text = "From state 1b, the input is a, the string enters a trap state, and therefore is considered invalid for the DFA";
lblInputChar.Text = "INVALID INPUT";
forCTR++;
currentState++;
btnNext.Enabled = false;
}
else
{
//STAYS WHEREVER IT IS
lblInputChar.Text = "INVALID INPUT";
//StatusBar.Text = "The string does not reach the end state, and is therefore invalid";
btnNext.Enabled = false;
}
}
else if (currentState == 3)
{
if (sim[forCTR] == 'a' || sim[forCTR] == 'b')
{
DFA1simState2.Hide();
DFA1simState3.Show();
lblInputChar.Text += Convert.ToString(sim[forCTR]);
forCTR++;
currentState++;
}
else
{
//STAYS WHEREVER IT IS
lblInputChar.Text = "INVALID INPUT";
//StatusBar.Text = "The string does not reach the end state, and is therefore invalid";
btnNext.Enabled = false;
}
}
else if (currentState == 4)
{
if (sim[forCTR] == 'a' || sim[forCTR] == 'b')
{
DFA1simState3.Hide();
DFA1simState4.Show();
lblInputChar.Text += Convert.ToString(sim[forCTR]);
//StatusBar.Text = "From state 3, the input is " + sim[forCTR] + ", therefore the string enters state 4";
forCTR++;
currentState++;
}
else
{
//STAYS WHEREVER IT IS
lblInputChar.Text = "INVALID INPUT";
//StatusBar.Text = "The string does not reach the end state, and is therefore invalid";
btnNext.Enabled = false;
}
}
else if (currentState > 4)
{
if (sim[forCTR] == 'a' || sim[forCTR] == 'b')
{
DFA1simState4.Hide();
DFA1simStateEndLoop.Show();
lblInputChar.Text += Convert.ToString(sim[forCTR]);
//StatusBar.Text = "From state 4, the input is " + sim[forCTR] + ", therefore the string stays in state 4";
forCTR++;
currentState++;
}
else
{
//STAYS WHEREVER IT IS
lblInputChar.Text = "INVALID INPUT";
//StatusBar.Text = "Input is neither a or b so the string doesn't go to any state, and is therefore invalid";
btnNext.Enabled = false;
}
}
}
else
{
if (currentState > 4)
{
lblInputChar.Text = "VALID INPUT";
//StatusBar.Text = "The string ends in the end state, and is therefore valid!";
btnNext.Enabled = false;
}
else if (currentState <= 4)
{
lblInputChar.Text = "INVALID INPUT";
// StatusBar.Text = "The string does not end in the end state, and is therefore invalid!";
btnNext.Enabled = false;
}
currentState++;
}
break;
#endregion
#region REGEX2
case "Regular Expression: ((101+111+101) + (1+0+11)*) (1+0+01)* (111+000+101) (1+0)*":
if (forCTR <= stringSimulation.Length - 1)
{
if (currentState == 0)
{
DFA2simState0.Show();
currentState = 1;
}
else if (currentState == 1) //starting state
{
if (sim[forCTR] == '1')
{
DFA2simState0.Hide();
DFA2simState1.Show();
lblInputChar.Text += Convert.ToString(sim[forCTR]);
forCTR++;
currentState = 2;
}
else if (sim[forCTR] == '0')
{
DFA2simState0.Hide();
DFA2simState1.Hide();
DFA2simState2.Show();
lblInputChar.Text += Convert.ToString(sim[forCTR]);
forCTR++;
currentState = 2;
}
else
{
//start state only
lblInputChar.Text = "INVALID INPUT";
btnNext.Enabled = false;
}
}
else if (currentState == 2)
{
if (sim[forCTR - 1] == '1' && sim[forCTR] == '1')
{
DFA2simState1.Hide();
DFA2simState3.Show();
lblInputChar.Text += Convert.ToString(sim[forCTR]);
forCTR++;
currentState = 3;
}
else if (sim[forCTR - 1] == '1' && sim[forCTR] == '0')
{
DFA2simState1.Hide();
DFA2simState4.Show();
lblInputChar.Text += Convert.ToString(sim[forCTR]);
forCTR++;
currentState = 4;
}
else if (sim[forCTR - 1] == '0' && sim[forCTR] == '0')
{
DFA2simState2.Hide();
DFA2simState5.Show();
lblInputChar.Text += Convert.ToString(sim[forCTR]);
forCTR++;
currentState = 5;
}
else if (sim[forCTR - 1] == '0' && sim[forCTR] == '1')
{
DFA2simState2.Hide();
DFA2simState1.Show();
lblInputChar.Text += Convert.ToString(sim[forCTR]);
forCTR++;
currentState = 2;
}
else
{
//STAYS WHEREVER IT IS
lblInputChar.Text = "INVALID INPUT";
btnNext.Enabled = false;
}
}
else if (currentState == 3)
{
if (sim[forCTR] == '1')
{
DFA2simState1.Hide();
DFA2simState2.Hide();
DFA2simState3.Hide();
DFA2simState6.Show();
lblInputChar.Text += Convert.ToString(sim[forCTR]);
forCTR++;
currentState = 6;
}
else if (sim[forCTR] == '0')
{
DFA2simState1.Hide();
DFA2simState2.Hide();
DFA2simState3.Hide();
DFA2simState4.Show();
lblInputChar.Text += Convert.ToString(sim[forCTR]);
forCTR++;
currentState = 4;
}
else
{
//STAYS WHEREVER IT IS
lblInputChar.Text = "INVALID INPUT";
btnNext.Enabled = false;
}
}
else if (currentState == 4)
{
if (sim[forCTR] == '1')
{
DFA2simState1.Hide();
DFA2simState2.Hide();
DFA2simState3.Hide();
DFA2simState4.Hide();
DFA2simState6.Show();
lblInputChar.Text += Convert.ToString(sim[forCTR]);
forCTR++;
currentState = 6;
}
else if (sim[forCTR] == '0')
{
DFA2simState1.Hide();
DFA2simState2.Hide();
DFA2simState3.Hide();
DFA2simState4.Hide();
DFA2simState5.Show();
lblInputChar.Text += Convert.ToString(sim[forCTR]);
forCTR++;
currentState = 5;
}
else
{
//STAYS WHEREVER IT IS
lblInputChar.Text = "INVALID INPUT";
btnNext.Enabled = false;
}
}
else if (currentState == 5)
{
if (sim[forCTR] == '1')
{
DFA2simState1.Hide();
DFA2simState2.Hide();
DFA2simState3.Hide();
DFA2simState4.Hide();
DFA2simState5.Hide();
DFA2simState1.Show();
lblInputChar.Text += Convert.ToString(sim[forCTR]);
forCTR++;
currentState = 2;
}
else if (sim[forCTR] == '0')
{
DFA2simState1.Hide();
DFA2simState2.Hide();
DFA2simState3.Hide();
DFA2simState4.Hide();
DFA2simState5.Hide();
DFA2simState6.Show();
lblInputChar.Text += Convert.ToString(sim[forCTR]);
forCTR++;
currentState = 6;
}
else
{
//STAYS WHEREVER IT IS
lblInputChar.Text = "INVALID INPUT";
btnNext.Enabled = false;
}
}
else if (currentState >= 6)
{
if (sim[forCTR] == '1' || sim[forCTR] == '0')
{
DFA2simState1.Hide();
DFA2simState2.Hide();
DFA2simState3.Hide();
DFA2simState4.Hide();
DFA2simState5.Hide();
DFA2simState6.Hide();
DFA2simStateEndLoop.Show();
lblInputChar.Text += Convert.ToString(sim[forCTR]);
forCTR++;
currentState++;
}
else
{
DFA2simState1.Hide();
DFA2simState2.Hide();
DFA2simState3.Hide();
DFA2simState4.Hide();
DFA2simState5.Hide();
DFA2simState6.Show();
lblInputChar.Text = "VALID INPUT";
btnNext.Enabled = false;
}
}
}
else
{
if (currentState >= 6)
{
lblInputChar.Text = "VALID INPUT";
btnNext.Enabled = false;
}
else if (currentState < 6)
{
lblInputChar.Text = "INVALID INPUT";
btnNext.Enabled = false;
}
currentState++;
}
break;
}
}