Programmacode bij De simpele rekenmachine
#Rekenmachine v.0.1
import math
import numpy
import tkinter as tk
from tkinter import filedialog
import tkinter as tk
def Eval(R):
SYM = ["+", "-", "x", ":"]
for sym in SYM:
if sym in R:
S = R.split(sym)
if len(S[1]) == 0:
return S[0]
if sym == "+":
n = float(S[0]) + float(S[1])
if sym == "-":
n = float(S[0]) - float(S[1])
if sym == "x":
n = float(S[0]) * float(S[1])
if sym == ":":
if float(S[1]) == 0:
n = 0
else:
n = float(S[0]) / float(S[1])
return str(n)
return R
def Click(n):
global R
if n == 0: # wortel
R = Eval(R)
t = float(R)
if t < 0:
m = 0
else:
m = math.sqrt(t)
R = str(m)
if n == 1: # kwadraat
R = Eval(R)
t = float(R)
m = t*t
R = str(m)
if n == 2: # delen
R = Eval(R)+":"
if n == 3: # vermenigvuldigen
R = Eval(R)+"x"
if n == 4: # 7
if R == "0":
R = ""
R += "7"
if n == 5: # 8
if R == "0":
R = ""
R += "8"
if n == 6: # 9
if R == "0":
R = ""
R += "9"
if n == 7: # aftrekken
R = Eval(R)+"-"
if n == 8: # 4
if R == "0":
R = ""
R += "4"
if n == 9: # 5
if R == "0":
R = ""
R += "5"
if n == 10: # 6
if R == "0":
R = ""
R += "6"
if n == 11: # optellen
R = Eval(R)+"+"
if n == 12: # 1
if R == "0":
R = ""
R += "1"
if n == 13: # 2
if R == "0":
R = ""
R += "2"
if n == 14: # 3
if R == "0":
R = ""
R += "3"
if n == 15: # Enter (Resultaat bekijken)
R = Eval(R)
if n == 16: # Clear
R = "0"
if n == 17: # 0
if R == "0":
R = ""
R += "0"
if n == 18: # Del
lr = len(R)
R = R[0:lr-1]
if R == "":
R = "0"
if n == 19: # exit
DestroyButtons()
return
text.delete('1.0', tk.END)
text.insert(tk.INSERT, R+"\n")
return
def DestroyButtons():
for y in range(5):
for x in range (4):
buttons[y][x].destroy()
text.destroy()
root.destroy()
return
def ShowButtons():
text.grid(row=0, column=0, columnspan = 4, sticky="nsew")
#root.grid_rowconfigure(1, weight=1)
#root.grid_columnconfigure(1, weight=1)
for yy in range (5):
y = yy+1
button_row = []
for x in range (4):
color= "light gray"
nr = 4*yy+x
button = tk.Button(root, text=TEKSTEN[nr], width=5, height=1,
bg=color, fg="black", borderwidth = 1,
font=(FontName, FontSize, 'bold'),
command=lambda nr = nr: Click(nr))
button.grid(row=y, column=x, sticky="nsew")
button_row.append(button)
buttons.append(button_row)
root.grid_rowconfigure(6, weight=1)
root.grid_columnconfigure(4, weight=1)
return
FontName = 'Verdana'
FontSize = '18'
root = tk.Tk()
text = tk.Text(root, height = 1, width = 18, font = (FontName, FontSize, 'bold'))
TEKSTEN = [" wortel "," kwad ","÷","×", "7","8","9","-", "4","5","6","+",
"1","2","3","=", "Clear","0","Del","eXit"]
R = "0"
buttons = []
ShowButtons()
root.mainloop()
#Terug naar boven
import math
import numpy
import tkinter as tk
import random
import sys
root = tk.Tk()
button = tk.Button(root, text="Exit", width=4, height=1, bg="light gray",
fg="black", borderwidth = 1,
font=('Helvetica', '32', 'bold'),
command=lambda root=root: root.destroy())
button.grid(row=0, column=0, sticky="nsew")
root.grid_rowconfigure(1, weight=1)
root.grid_columnconfigure(1, weight=1)
root.mainloop()
Programmacode bij opdracht 2
#Rekenmachine v.0.1
import math
import numpy
import tkinter as tk
from tkinter import filedialog
import tkinter as tk
def Eval(R):
SYM = ["+", "-", "x", ":"]
for sym in SYM:
if sym in R:
S = R.split(sym)
if len(S[1]) == 0:
return S[0]
if sym == "+":
n = float(S[0]) + float(S[1])
if sym == "-":
n = float(S[0]) - float(S[1])
if sym == "x":
n = float(S[0]) * float(S[1])
if sym == ":":
if float(S[1]) == 0:
n = 0
else:
n = float(S[0]) / float(S[1])
return str(n)
return R
def Click(nn):
global R
n = nn-4
if n == -4: # log
R = Eval(R)
if n == -3: # sin
R = Eval(R)
if n == -2: # cos
R = Eval(R)
if n == -1: # tan
R = Eval(R)
if n == 0: # wortel
R = Eval(R)
t = float(R)
if t < 0:
m = 0
else:
m = math.sqrt(t)
R = str(m)
if n == 1: # kwadraat
R = Eval(R)
t = float(R)
m = t*t
R = str(m)
if n == 2: # delen
R = Eval(R)+":"
if n == 3: # vermenigvuldigen
R = Eval(R)+"x"
if n == 4: # 7
if R == "0":
R = ""
R += "7"
if n == 5: # 8
if R == "0":
R = ""
R += "8"
if n == 6: # 9
if R == "0":
R = ""
R += "9"
if n == 7: # aftrekken
R = Eval(R)+"-"
if n == 8: # 4
if R == "0":
R = ""
R += "4"
if n == 9: # 5
if R == "0":
R = ""
R += "5"
if n == 10: # 6
if R == "0":
R = ""
R += "6"
if n == 11: # optellen
R = Eval(R)+"+"
if n == 12: # 1
if R == "0":
R = ""
R += "1"
if n == 13: # 2
if R == "0":
R = ""
R += "2"
if n == 14: # 3
if R == "0":
R = ""
R += "3"
if n == 15: # Enter (Resultaat bekijken)
R = Eval(R)
if n == 16: # Clear
R = "0"
if n == 17: # 0
if R == "0":
R = ""
R += "0"
if n == 18: # Del
lr = len(R)
R = R[0:lr-1]
if R == "":
R = "0"
if n == 19: # exit
DestroyButtons()
return
text.delete('1.0', tk.END)
text.insert(tk.INSERT, R+"\n")
return
def DestroyButtons():
for y in range(5):
for x in range (4):
buttons[y][x].destroy()
text.destroy()
root.destroy()
return
def ShowButtons():
text.grid(row=0, column=0, columnspan = 4, sticky="nsew")
#root.grid_rowconfigure(1, weight=1)
#root.grid_columnconfigure(1, weight=1)
for yy in range (6):
y = yy+1
button_row = []
for x in range (4):
color= "light gray"
nr = 4*yy+x
button = tk.Button(root, text=TEKSTEN[nr], width=4, height=1,
bg=color, fg="black", borderwidth = 1,
font=(FontName, FontSize, 'bold'),
command=lambda nr = nr: Click(nr))
button.grid(row=y, column=x, sticky="nsew")
button_row.append(button)
buttons.append(button_row)
root.grid_rowconfigure(7, weight=1)
root.grid_columnconfigure(4, weight=1)
return
FontName = 'Verdana'
FontSize = '14'
root = tk.Tk()
text = tk.Text(root, height = 1, width = 16, font =
(FontName, FontSize, 'bold'))
TEKSTEN = ["exp","sin","cos","tan", "inv","kwad",":","x", "7","8","9","-",
"4","5","6","+", "1","2","3","=", "Clear","0","Del","eXit"]
R = "0"
buttons = []
ShowButtons()
root.mainloop()
Programmacode bij Opdracht 4
#Rekenmachine v.0.1
import math
import numpy
import tkinter as tk
from tkinter import filedialog
import tkinter as tk
def Eval(R):
SYM = ["+", "-", "x", ":"]
for sym in SYM:
if sym in R:
S = R.split(sym)
if len(S[1]) == 0:
return S[0]
if sym == "+":
n = float(S[0]) + float(S[1])
if sym == "-":
n = float(S[0]) - float(S[1])
if sym == "x":
n = float(S[0]) * float(S[1])
if sym == ":":
if float(S[1]) == 0:
n = 0
else:
n = float(S[0]) / float(S[1])
return str(n)
return R
def Click(nn):
global R
n = nn-4
if n == -4: # log
R = Eval(R)
if n == -3: # sin
R = Eval(R)
if n == -2: # cos
R = Eval(R)
if n == -1: # tan
R = Eval(R)
if n == 0: # wortel
R = Eval(R)
t = float(R)
if t < 0:
m = 0
else:
m = math.sqrt(t)
R = str(m)
if n == 1: # kwadraat
R = Eval(R)
t = float(R)
m = t*t
R = str(m)
if n == 2: # delen
R = Eval(R)+":"
if n == 3: # vermenigvuldigen
R = Eval(R)+"x"
if n == 4: # 7
if R == "0":
R = ""
R += "7"
if n == 5: # 8
if R == "0":
R = ""
R += "8"
if n == 6: # 9
if R == "0":
R = ""
R += "9"
if n == 7: # aftrekken
R = Eval(R)+"-"
if n == 8: # 4
if R == "0":
R = ""
R += "4"
if n == 9: # 5
if R == "0":
R = ""
R += "5"
if n == 10: # 6
if R == "0":
R = ""
R += "6"
if n == 11: # optellen
R = Eval(R)+"+"
if n == 12: # 1
if R == "0":
R = ""
R += "1"
if n == 13: # 2
if R == "0":
R = ""
R += "2"
if n == 14: # 3
if R == "0":
R = ""
R += "3"
if n == 15: # Enter (Resultaat bekijken)
R = Eval(R)
if n == 16: # Clear
R = "0"
if n == 17: # 0
if R == "0":
R = ""
R += "0"
if n == 18: # Del
lr = len(R)
R = R[0:lr-1]
if R == "":
R = "0"
if n == 19: # exit
DestroyButtons()
return
text.delete('1.0', tk.END)
text.insert(tk.INSERT, R+"\n")
return
def DestroyButtons():
for y in range(5):
for x in range (4):
buttons[y][x].destroy()
text.destroy()
root.destroy()
return
def ShowButtons():
text.grid(row=0, column=0, columnspan = 4, sticky="nsew")
#root.grid_rowconfigure(1, weight=1)
#root.grid_columnconfigure(1, weight=1)
for yy in range (6):
y = yy+1
button_row = []
for x in range (4):
color= "light gray"
nr = 4*yy+x
button = tk.Button(root, text=TEKSTEN[nr], width=4, height=1,
bg=color, fg="black", borderwidth = 1,
font=(FontName, FontSize, 'bold'),
command=lambda nr = nr: Click(nr))
button.grid(row=y, column=x, sticky="nsew")
button_row.append(button)
buttons.append(button_row)
root.grid_rowconfigure(7, weight=1)
root.grid_columnconfigure(4, weight=1)
return
FontName = 'Verdana'
FontSize = '14'
root = tk.Tk()
text = tk.Text(root, height = 1, width = 16, font =
(FontName, FontSize, 'bold'))
TEKSTEN = ["exp","sin","cos","tan", "inv","kwad",":","x", "7","8","9","-",
"4","5","6","+", "1","2","3","=", "Clear","0","Del","eXit"]
R = "0"
buttons = []
ShowButtons()
root.mainloop()
Programmacode bij Opdracht 5
#Rekenmachine v.0.1
import math
import tkinter as tk
def Eval(R):
sgn = ""
if len(R) > 0 and R[0] == "-": # Haal min teken van eerste getal af
R = R[1:]
sgn = "-"
if len(R) > 0 and not R[0].isdigit(): #R[0] moet een digit zijn
R = "Error"
return R
SYM = ["+", "-", "x", ":"]
for sym in SYM:
if sym in R: # Controleer operatie
S = R.split(sym)
s0 = float(sgn + S[0])
if len(S[1]) == 0:
result = str(s0)
else:
s1 = float(S[1])
if sym == "+":
result = str(s0 + s1)
if sym == "-":
result = str(s0 - s1)
if sym == "x":
result = str(s0 * s1)
if sym == ":":
if s1 == 0:
result = "Error"
else:
result = str(s0/s1)
return result
return sgn+R
def Click(nr):
global R
nr = nr-4
ev = Eval(R)
if "Error" in ev:
if nr in [16,18]:
R = ""
ev = ""
text.configure(state = "normal")
# Er kan alleen met de toetsen worden gewerkt
text.delete("1.0", tk.END)
text.insert(tk.INSERT,ev)
text.configure(state = "disabled")
return
if nr == -4: # log
R = Eval(R)
if nr == -3: # sin
R = Eval(R)
if nr == -2: # cos
R = Eval(R)
if nr == -1: # tan
R = Eval(R)
lr = len(R)
if nr == 0 and lr > 0: # wortel
R = ev
n = float(R)
if n < 0:
R = "Error"
return
else:
m = math.sqrt(n)
R = str(m)
if nr == 1 and lr > 0 : # kwadraat
R = ev
n = float(R)
m = n*n
R = str(m)
if nr == 2: # Delen
R = ev + ":"
if nr == 3: # Vermenigvuldigen
R = ev + "x"
if nr in range(4,7): # 7, 8 en 9
R += str(nr + 3)
if nr == 7: # Aftrekken
R = ev + "-"
if nr in range(8,11): # 4, 5 en 6
R += str(nr - 4)
if nr == 11: # Optellen
R = ev + "+"
if nr in range(12,15): # 1, 2 en 3
R += str(nr - 11)
if nr == 15: # Enter (Resultaat bekijken)
R = ev
if nr == 16: # Clear
R = ""
if nr == 17: # 0
R += str(0)
if nr == 18: # Del
lr = len(R)
if lr > 0:
R = R[0:lr-1]
if nr == 19: # exit
DestroyButtons()
return
text.configure(state = "normal")
# Er kan alleen met de toetsen worden gewerkt
text.delete("1.0", tk.END)
text.insert(tk.INSERT, R)
text.configure(state = "disabled")
return
def DestroyButtons():
for y in range(5):
for x in range (4):
buttons[y][x].destroy()
text.destroy()
root.destroy()
return
def ShowButtons():
text.grid(row=0, column=0, columnspan = 3, sticky="nsew")
button = tk.Button(root, text="eXit", width=3, height=1,
bg=color, fg="black", borderwidth = 1,
font=(FontName, FontSize, "bold"),
command=lambda root=root: DestroyButtons())
button.grid(row=0, column=3, sticky="nsew")
#root.grid_rowconfigure(1, weight=1)
#root.grid_columnconfigure(1, weight=1)
for yy in range (6):
y = yy+1
button_row = []
for x in range (4):
nr = 4*yy+x
button = tk.Button(root, text=TEKSTEN[nr], width=3, height=1,
bg=color, fg="black", borderwidth = 1,
font=(FontName, FontSize, "bold"),
command=lambda nr = nr: Click(nr))
button.grid(row=y, column=x, sticky="nsew")
button_row.append(button)
buttons.append(button_row)
root.grid_rowconfigure(7, weight=1)
root.grid_columnconfigure(4, weight=1)
return
color= "light gray"
FontName = "Verdana"
FontSize = "14"
root = tk.Tk()
text = tk.Text(root, height = 1, width = 16, font =
(FontName, FontSize, "bold"))
TEKSTEN = ["exp","sin","cos","tan", "inv","kwad",":","x", "7","8","9","-",
"4","5","6","+", "1","2","3","=", "Clear","0","Del","."]
R = ""
buttons = []
ShowButtons()
root.mainloop()
Opmerking: na de aanpassing die in dit stuk code is gemaakt, zit er een kleine onhandigheid in het programma: zodra de "error" op het scherm gekomen is, werkt de "eXit" knop niet meer. Pas nadat je op "Clear" hebt gedrukt, werkt die knop weer.
