Final answer:
To create a simple calculator, you can define four functions for each operation: addition, subtraction, multiplication, and division. Each operation follows specific rules for determining the sign of the answer. For example, addition follows rules based on the signs of the numbers being added, while multiplication follows rules based on whether the numbers being multiplied have the same or opposite signs.
Step-by-step explanation:
To create a simple calculator, you can define four functions for each operation: addition, subtraction, multiplication, and division.
For addition, you can simply add the two numbers together, taking into account the signs of the numbers. If both numbers have the same sign, the answer will have the same sign. If the numbers have opposite signs, subtract the smaller number from the larger number and use the sign of the larger number.
For subtraction, you can change the sign of the number being subtracted and follow the addition rules as mentioned earlier. For example, subtracting 3 from 5 would be equivalent to adding -3 to 5.
For multiplication, you can use the same rules as addition, where positive numbers multiplied together result in a positive answer, negative numbers multiplied together also result in a positive answer, and one positive and one negative number multiplied together result in a negative answer.
Lastly, for division, you can follow the multiplication rules for the sign of the answer. For example, dividing a positive number by a positive number or a negative number by a negative number will result in a positive answer. Dividing a positive number by a negative number or a negative number by a positive number will result in a negative answer. It's important to handle any division by zero cases separately to avoid errors.