66 lines
1.5 KiB
Python
66 lines
1.5 KiB
Python
|
import sys
|
|||
|
|
|
|||
|
|
sp = [] # Список для истории
|
|||
|
|
|
|||
|
|
def add(a, b):
|
|||
|
|
return a + b
|
|||
|
|
|
|||
|
|
def subtract(a, b):
|
|||
|
|
return a - b
|
|||
|
|
|
|||
|
|
def multiply(a, b):
|
|||
|
|
return a * b
|
|||
|
|
|
|||
|
|
def divide(a, b):
|
|||
|
|
if b == 0:
|
|||
|
|
return 'Ошибка: деление на 0'
|
|||
|
|
return a / b
|
|||
|
|
def calculate(n1, op, n2):
|
|||
|
|
if op == '+':
|
|||
|
|
res = add(n1, n2)
|
|||
|
|
elif op == '-':
|
|||
|
|
res = subtract(n1, n2)
|
|||
|
|
elif op == '*':
|
|||
|
|
res = multiply(n1, n2)
|
|||
|
|
elif op == '/':
|
|||
|
|
res = divide(n1, n2)
|
|||
|
|
else:
|
|||
|
|
return 'Неизвестная операция'
|
|||
|
|
return res
|
|||
|
|
|
|||
|
|
def show_history():
|
|||
|
|
print('\n--- История ---')
|
|||
|
|
for i, entry in enumerate(sp[-5:], 1):
|
|||
|
|
print(f' {i}. {entry}')
|
|||
|
|
print()
|
|||
|
|
|
|||
|
|
def calc():
|
|||
|
|
while True:
|
|||
|
|
try:
|
|||
|
|
n1 = float(input('Первое число: '))
|
|||
|
|
n2 = float(input('Второе число: '))
|
|||
|
|
except ValueError:
|
|||
|
|
print('Ошибка: введите число!')
|
|||
|
|
continue
|
|||
|
|
|
|||
|
|
op = input('Операция (+, -, *, /): ')
|
|||
|
|
|
|||
|
|
result = calculate(n1, op, n2)
|
|||
|
|
if isinstance(result, str):
|
|||
|
|
print(result)
|
|||
|
|
continue
|
|||
|
|
|
|||
|
|
entry = f'{n1} {op} {n2} = {result}'
|
|||
|
|
sp.append(entry)
|
|||
|
|
print(entry)
|
|||
|
|
|
|||
|
|
pol = input('Ещё раз? (да/history/нет): ')
|
|||
|
|
if pol == 'нет':
|
|||
|
|
break
|
|||
|
|
elif pol == 'history':
|
|||
|
|
show_history()
|
|||
|
|
elif pol != 'да':
|
|||
|
|
print('Не тот выбор')
|
|||
|
|
|
|||
|
|
calc()
|