Suppose you want to change an existing program to have more of a modular architecture. The program contains a basic calculator program. Which of the following would be an appropriate attribute for the calculator class?

Question

Calculate
Subtraction
Addition
Number 1

Answer 1

In the context of designing a calculator class with a more modular architecture, the appropriate attributes would typically represent the essential characteristics of the calculator that can be used to perform operations. Among the options you've provided, "Number 1" could be considered an appropriate attribute for the calculator class because it represents one of the inputs needed for calculations.

Here's a breakdown of your choices:

• Calculate: This sounds more like a method/function rather than an attribute. It signifies the action the calculator performs.

• Subtraction: This is also more of a method or operation name than an attribute, although you could technically represent it as a flag or state in some contexts.

• Addition: Similar to subtraction, this represents an operation rather than a state or property of the calculator.

• Number 1: This could be an attribute (like number1) that stores a value needed for calculations.

For a modular architecture, you might also consider including attributes for additional numbers (like number2), and perhaps operations could be methods rather than attributes. Overall, "Number 1" is the most fitting choice for an attribute in a calculator class based on the options you've given.