To evaluate a simple expression, you need to have two numbers and an operator. Assume that the normal operators of addition, subtraction, multiplication, and division should be recognized. So, If operator is '+ → number1 + number2 will be evaluated and displayed. If operator is - → number1 - number2 will be evaluated and displayed. If operator is * → number1 * number2 will be evaluated and displayed. If operator is '/ → number1 / number2 will be evaluated and displayed. Any other operators → Display "Unknown operator!" message. a) Write a program using switch-case statements that allows the user to type in simple expressions of the form number operator number b) The program evaluates the expression and displays the results at the terminal, to two decimal places of accuracy. c) The program, however, is allowed to call the scanf function only once. d) Remember to have the program check for division by zero.

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