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将计算也使用栈

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lsy2246 2024-06-08 12:35:01 +08:00
parent 15d8317298
commit 16ffcccddf
1 changed files with 22 additions and 29 deletions
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51
python/code/calculator.py
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@ -51,33 +51,26 @@ def format_data(data):
while _static_tmp:
formula.append(_static_tmp.pop(-1))
return formula
numbers_stack = []
while formula:
single_item = formula.pop(0)
if single_item.isdigit():
numbers_stack.append(single_item)
else:
number2 = float(numbers_stack.pop(-1))
number1 = float(numbers_stack.pop(-1))
match single_item:
case '+':
numbers_stack.append(number1 + number2)
case '-':
numbers_stack.append(number1 - number2)
case '*':
numbers_stack.append(number1 * number2)
case '/':
numbers_stack.append(number1 / number2)
case '%':
numbers_stack.append(number1 % number2)
return numbers_stack[0]
def compute(formula):
if len(formula) == 1:
return formula[0]
else:
for index, item in enumerate(formula):
if item in ['+', '-', '*', '/', '%']:
match item:
case '+':
formula[index - 2] = float(formula[index - 2]) + float(formula[index - 1])
case '-':
formula[index - 2] = float(formula[index - 2]) - float(formula[index - 1])
case '*':
formula[index - 2] = float(formula[index - 2]) * float(formula[index - 1])
case '/':
formula[index - 2] = float(formula[index - 2]) / float(formula[index - 1])
case '%':
formula[index - 2] = float(formula[index - 2]) % float(formula[index - 1])
formula.pop(index - 1)
formula.pop(index - 1)
formula = compute(formula)
return formula
Equation = "3%2"
formula = format_data(Equation)
result = compute(formula)
print(result)
Equation = "1+2/2+(3*3+2)"
print(format_data(Equation))