메서드4

class Calc:

    def add(self, x, y):
        return x + y

    def sub(self, x, y):
        return x - y

    def mul(self, x, y):
        return x * y

    def div(self, x, y):
        return x / y

    def showInfo(self, x, y):
        print("%d + %d = %d"%(x,y,self.add(x,y)))
        print("%d - %d = %d" % (x,y,self.sub(x, y)))
        print("%d * %d = %d" % (x,y,self.mul(x, y)))
        if y != 0:
            print("%d / %d = %.1f" % (x,y,self.div(x, y)))
        else:
            print("0으로는 나눌 수 없습니다.")

c = Calc()
c.showInfo(5, 3)