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When it is required to create a class that performs calculator operations, object oriented method is used. Here, a class is defined, and attributes are defined. Functions are defined within the class that perform certain operations. An instance of the class is created, and the functions are used to perform calculator operations.

Below is a demonstration for the same −

class calculator_implementation(): def __init__(self,in_1,in_2): self.a=in_1 self.b=in_2 def add_vals(self): return self.a+self.b def multiply_vals(self): return self.a*self.b def divide_vals(self): return self.a/self.b def subtract_vals(self): return self.a-self.b input_1 = int(input("Enter the first number: ")) input_2 = int(input("Enter the second number: ")) print("The entered first and second numbers are : ") print(input_1, input_2) my_instance = calculator_implementation(input_1,input_2) choice=1 while choice!=0: print("0. Exit") print("1. Addition") print("2. Subtraction") print("3. Multiplication") print("4. Division") choice=int(input("Enter your choice... ")) if choice==1: print("The computed addition result is : ",my_instance.add_vals()) elif choice==2: print("The computed subtraction result is : ",my_instance.subtract_vals()) elif choice==3: print("The computed product result is : ",my_instance.multiply_vals()) elif choice==4: print("The computed division result is : ",round(my_instance.divide_vals(),2)) elif choice==0: print("Exit") else: print("Sorry, invalid choice!") print()

Enter the first number: 70 Enter the second number: 2 The entered first and second numbers are : 70 2 0. Exit 1. Addition 2. Subtraction 3. Multiplication 4. Division Enter your choice... 1 The computed addition result is : 72 0. Exit 1. Addition 2. Subtraction 3. Multiplication 4. Division Enter your choice... 2 The computed subtraction result is : 68 0. Exit 1. Addition 2. Subtraction 3. Multiplication 4. Division Enter your choice... 3 The computed product result is : 140 0. Exit 1. Addition 2. Subtraction 3. Multiplication 4. Division Enter your choice... 4 The computed division result is : 35.0 0. Exit 1. Addition 2. Subtraction 3. Multiplication 4. Division Enter your choice... 0 Exit

- A class named ‘calculator_implementation’ class is defined, that has functions like ‘add_vals’, ‘subtract_vals’, ‘multiply_vals’, and ‘divide_vals’.
- These are used to perform calculator operations such as addition, subtraction, multiplication, and division respectively.
- An instance of this class is created.
- The value for the two numbers are entered and operations are performed on it.
- Relevant messages and output is displayed on the console.

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