Write the program in C++ only.

FOLLOW THE SPECIFICATIONS BELOW TO create the following functions to calculate and display the sum or product of the integers from 1 to the number input. (Remember you already coded calculating the sum in Assignment 6, now you have to put that code in a function)

getNum Receives no input. Prompts the user to enter a number, use a loop to validate. Returns the result.

calcSum Receives an integer as input. USE AN ACCUMULATOR to calculate the sum of the integers from 1 to this number. Returns the result.

calcProd Receives an integer as input. USE AN ACCUMULATOR to calculate the product of the integers from 1 to this number. Returns the result.

Main should:

Prompt for a character that determines if you want to calculate the sum (S or s) or product (P or p). Use a switch to process the choices. Upper and lower case values should work the same way. Use default to give an error message if anything else is entered.

if a valid option is entered, use getNum to prompt for the number

Note that calcSum and calcProduct RETURN the result to main, and the output is printed in main.

For example, if you input 5 as the number, and S, the program should calculate 1 + 2 + 3 + 4 + 5 and display the sum as 15. If you input 5 and P the program should calculate 1 x 2 x 3 x 4 x 5 and display the product as 120. . The process should repeat as long as the user wants to continue. This loop should be in main. DO NOT use System.exit command to end the program. . See sample output below.

WHERE TO START? Do NOT focus on main, user input, switch, loop to start! Code and test calcSum first! You already did this problem in Assignment 6 so you should have the algorithm. You should test it very simply with something like this:

int result;

result = calcSum(3); // what should the answer be?

cout << The answer is << result << endl;

Once this works, calcProduct is very similar to code.

Sample program output

(Test case 1)

Enter S for sum, P for prod:z

Invalid choice

Again(y/n)? y

Enter S for sum, P for prod:s

Enter an integer greater than 1: 1

Must be greater than 1, re-enter: -3

Must be greater than 1, re-enter: 3

The sum of the numbers from 1 to 3 is 6

Again(y/n)? y

Enter S for sum, P for prod:p

Enter an integer greater than 1: 4

The product of the numbers from 1 to 4 is 24

Again(y/n)? n

(continue with data below)

Test Data: show in one run the cases above, as well as

S, 15

P, 8

S, 25

P, 12