import os, re
def clearConsole():
os.system('cls' if os.name in ('nt', 'dos') else 'clear')
def comma2Dot(value):
return value.replace(",", ".")
def removeSpaces(value):
return re.sub(r"\s", "", value)
def insertValueFor(expression, variable, value):
return expression.replace(variable, value)
allowedCharacters = [
' ', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'+', '-', '*', '/', '(', ')', '.', 'p', 'i', 'x', 'r'
]
while True:
expression = input("Wprowadź wyrażenie: ")
expression = removeSpaces(expression.lower())
if expression == "": continue
expression = comma2Dot(expression)
if all(character in allowedCharacters for character in expression):
if "x" in expression:
x = float(comma2Dot(input("Podaj wartość dla x: ")))
expression = insertValueFor(expression, "x", str(x))
if "r" in expression:
r = float(comma2Dot(input("Podaj wartość dla r: ")))
expression = insertValueFor(expression, "r", str(r))
if "pi" in expression:
expression = insertValueFor(expression, "pi", "3.14")
try:
print("\n" + expression)
print(round(eval(expression), 2))
except ZeroDivisionError:
print("Bład dzielenia przez zero")
except:
print("Nieprawidłowe wyrażenie")
else:
if expression in ["s", "stop"]:
exit()
elif expression in ["c", "cls"]:
clearConsole()
continue
else:
print("Wprowadzone wyrażenie zawiera niedozwolone znaki")
print()
