## gara_mirza

what's wrong in this code in part 2 it should give answer same the solution part 1

Private Sub mnuFileCloce_Click()
End

End Sub

'para1
Private Sub Text1_Change()
Dim K1, K2, K3, K4, K5, K6, K7, K8, K9 As Double
Dim Tc, Pc, T, X, Xx, Xy, Xz, P As Double
K1 = -7.691234564
K2 = -26.08023696
K3 = -168.1706546
K4 = 64.23285504
K5 = -118.9646225
K6 = 4.167117732
K7 = 20.9750676
K8 = 1000000000#
K9 = 6#
Ts = Val(Text1.Text)
Tc = 647.3
Pc = 22120#
T = Ts + 273.15
X = T / Tc
Xx = 1 + K6 * (1 - X) + K7 * (1 - X) ^ 2
Xy = K8 * (1 - X) ^ 2 + K9
Xz = K1 * (1 - X) + K2 * (1 - X) ^ 2 + K3 * (1 - X) ^ 3 + K4 * (1 - X) ^ 4 + K5 * (1 - X) ^ 5
Ps = Pc * Exp(((1 / X) * Xz) / Xx - (1 - X) / Xy)
Text2.Text = Str(Ps)
If Text1.Text = "" Then Text2.Text = ""

If Text4.Text = "" Then Text3.Text = ""

End Sub

'part 2
Private Sub Text4_Change()
Dim K1, K2, K3, K4, K5, K6, K7, K8, K9 As Double
Dim Tc, Pc, T, Ts, X, Xx, Xy, Xz, Ps, P As Double
Dim A1, A2, A3, A4, A5, A6, PDIF As Double

Dim I As Long
A1 = 46.8922631
A2 = 3.61025379
A3 = -0.181752837
A4 = -0.00657409
A5 = -0.010390705
A6 = -0.00228354

K1 = -7.691234564
K2 = -26.08023696
K3 = -168.1706546
K4 = 64.23285504
K5 = -118.9646225
K6 = 4.167117732
K7 = 20.9750676
K8 = 1000000000
K9 = 6
I = 0
Pc = 22120
Ps = Val(Text4.Text)
P1 = (A1 + (A2 * Ps))
P2 = (A3 * Ps ^ 2)
P3 = (A4 * Ps ^ 3)
P4 = (A5 * Ps ^ 4)
P5 = (A6 * Ps ^ 5)
Ts = P1 + P2 + P3 + P4 + P5

30
T = Ts + 273.15
Tc = 647.3

X = T / Tc
Xx = 1 + K6 * (1 - X) + K7 * (1 - X) ^ 2
Xy = K8 * (1 - X) ^ 2 + K9
Xz = K1 * (1 - X) + K2 * (1 - X) ^ 2 + K3 * (1 - X) ^ 3 + K4 * (1 - X) ^ 4 + K5 * (1 - X) ^ 5
P = Pc * Exp((((1 / X) * Xz) / (Xx)) - ((1 - X) / Xy))

PDIF = Ps * 100# / P
If PDIF > 1.0001 Or PDIF < 0.9999 Then
Ts = Ts * ((PDIF) ^ 0.5)
I = I + 1
Label9.Caption = Str(I)
GoTo 30

End If

Text3.Text = Str(Ts)
If Text4.Text = "" Then Text3.Text = ""

End Sub

## Reverend Jim 3,233

First of all, you say you get a different "solution" which is essentially meaningless without knowing what variable contains the solution. Secondly, it's different code so why should you expect the same result(s)?

## gara_mirza

it should give me the not the same but part1 use for finding Ps by inputing Ts
and part2 use to find Ts by inputing Ps which i mea when the solution part1 most be equal to inpute part2 and the opposite is the same and there is this problem in part 2 when i input number 1 the visual basic programm will freeze it stop working and when i give input 100 it say over flow what wrong here

## Reverend Jim 3,233

You lost me at

the opposite is the same

In any case...

• In part 1 you don't declare Ps.
• In part 1 you do Ts = Val(Text1.Text)
• In part 2 you do Ts = P1 + P2 + P3 + P4 + P5
• In part2 you have a line that says only 30

etc.

I repeat - the code is different. Why do you expect the same results?

## gara_mirza

I saw that the code is different but what should I say if my teacher say it the solution should be same
I going to be crazy with this code and this program i’m trying so hard with my project its so complicated it related to psychometric chart (properties of air ) my teacher give me this code so as to work in the program but it go wrong so I see I have to find my own code

thanks for helping me Reverend Jim ^_^

## Minimalist 96

If you must use a goto statement you have to mark the line like so:
30:
GoTo 30

## Reverend Jim 3,233

Sorry. I saw the "30" by itself and missed the GOTO.Shame on me. Having said that, Never use a GOTO. If you do, then shame on you.

If the teacher gave you code to use then I suggest you use that code. If the GOTO is in your teacher's code then shame on him/her. I suspect your teacher is an engineer (based on the completely undescriptive variable names).