q1: Write a program which takes an integer as input and prints its digits in reverse order.
(Number of digits for the input number may vary.)
examples:
	input		output
	42		24
	1234		4321
	751694		496157
Hint: Use while loop and arithmetic operators.

q2: Calculator design: User will enter two integers (operands) and one operator 
(+, -, *, /, %). You will make the operation and print the result.
a. Do the operation using if statement.
b. Do the operation using switch statement only.