Question

我写了一个Python程序，它忽略了if循环。有人可以告诉我我做错了什么吗？请参见下面的代码：

class Check():
  def __init__(self, op1, op2, op):
            self.op1 = op1
            self.op2 = op2
            self.op = op


  def main():

        print("Enter first number: ")
        num1 = int(input())
        print("Enter second number: ")
        num2 = int(input())
        print("Enter operation: ")
        op=str(input())
        if op == '+':
            return op1 + op2
        elif op == '-':
            return op1 - op2
        elif op == '*':
            return op1 * op2
        elif op == '/':
            return op1 / op2

if __name__ == "__main__":
    main()

Answer 1

问题是op1和op2都没有，只有self.op1，self.op2，num1和num2。我假设您要添加num1和num2。你也没放

self

在奶酪中，这是工作程序

class Check():
    def __init__(self, op1, op2, op):
            self.op1 = op1
            self.op2 = op2
            self.op = op


    def cheese(self):
        print("Enter first number: ")
        op1 = int(input())
        print("Enter second number: ")
        op2 = int(input())
        print("Enter operation: ")
        op=str(input())
        if op == '+':
            return op1 + op2
        elif op == '-':
            return op1 - op2
        elif op == '*':
            return op1 * op2
        elif op == '/':
            return op1 / op2
a = Check(1,2,"+")
print(a.cheese())

如果忽略循环

1 个答案: