sol

class Calculator(object):
    total = []
    everything = 0

    def __init__(self):
        self.a = int(input("Enter a number: "))
        self.b = int(input("Enter a number: "))
        self.sum = sum
        self.res = 0
        self.rlist =[]


    def add(self):
        self.sum = self.a + self.b
        print(self.sum)
        self.total.append(self.sum)
        self.everything = self.everything + self.sum
        print(self.total)
        print(self.everything)
    def subtract(self):
        self.sum = self.a - self.b
        print(self.sum)
        self.total.append(self.sum)
        print(self.total)
    def multiply(self):
        self.sum = self.a * self.b
        print(self.sum)
        self.total.append(self.sum)
        print(self.total)
    def divide(self):
        self.sum = self.a / self.b
        print(self.sum)
        self.total.append(self.sum)
        print(self.total)
    def totalres(self):
        for i in self.total:
            self.res += i
            self.rlist.append(self.res)
        print("Add:",self.rlist)

opp = 0
while opp != "0":
    calc1 = Calculator()
    opp = input("Please enter 1 to ADD, 2 to SUBTRACT, 3 to MULTIPLY, 4 to DIVIDE: ")
    if opp == "1":
        calc1.add()

    elif opp == "2":
        calc1.subtract()

    elif opp == "3":
        calc1.multiply()

    elif opp == "4":
        calc1.divide()
    calc1.totalres()