Week 4 Assignment Part 2: A While Loop for Practicing Arithmetic Calculations

The program is designed to do the following:

1. Starts by generating two random integers (between 1 and 99 inclusive) and asks the user to enter the sum of the two integers, or enter -1 (minus one) to quit;
2. For each run of the while loop, the program reads the user input, and determines if the user's answer is correct.
3. If the answer is correct, it increments the count variable by 1 for the number of correct answers, and gives the feedback "Correct! "
4. If the answer is incorrect, it simply gives the feedback "Sorry. Not correct. "
5. For each run of the while loop, the loopCounter is incremented by 1
6. When the user enters -1, the while loop stops and the program tells the user how many correct answers she/he has got out of a total number of tries.

There are two JavaScript functions used in this program:

• Math.random()
• Math.round()

The first function returns a random number between zero and one, such as 0.9756070656669248 or 0.4477332493847449.

In the example, we multiply the random number by 100 to fit our needs, getting 97.56070656669247 or 44.77332493847449.

The second function rounds a number to its nearest integer:

 Math.round(97.56070656669247) returns 98.
 Math.round(44.77332493847449) returns 45.

To see a demo of the above functions, visit http://courses.dsu.edu/cet756/lessons/JavaScript/functions/mathrandom_and_mathround.htm

The Task:

Right now, the program has a bug that prevents it from determining correct answers and giving the right feedback. It'll say "Correct!" even when the user input is incorrect. Consequently, it cannot get the correct number of correct answers (sorry about the double use of "correct") when the user quits. Your task is to find and fix this bug.

This bug is somewhat subtle and may not be easily identified through a debugger. Please view the source code of the page carefully and see if you can find it. When you find the bug, write down what the problem is, and how it can be fixed.