b) 1. Write a calculator program which prompt user to insert two integer values and one character value which determine the action of calculation and display the result of calculation. This program should have the following functions: a) main - This function calls function getInput to get two numbers and an operation from a user. It also call function calculate by passing 3 arguments which are first number, second number and operation. Finally it calls function displayResult to display the result of the calculation. This input and calculation processes are repeated until the user choose to stop. getInput - This function reads two(2) numbers and an operation from the keyboard. It uses pointers to read the first number, the second number, the operation and place them in the calling function's variables(use pass by reference) calculate - This function calculates the result of the operation selected by the user for the two numbers. It uses pointers to store the first number, the second number and the operation sent by the calling function and to return the result of the operation to the calling function. d) displayResult - this function will display the result of the selected operation on the screen. c) MENU + : Add - Subtract *: Multiply /: Divide X: Exit Enter your choice : + Enter first number 10 Enter second number : 5 10 + 5 = 15 Enter your choice :- Enter first number 12 Enter second number : 6 12 - 6 - 6 Enter your choice :x