A question about a question

Can someone explain this question? I don't want the answer, just an explaination. I can write the program easy enough but what does the rest of the question mean?



6.Write a piece of code that will demonstrate a logical error in a program that was designed to calculate the average of three test grades. Be sure to make it clear to me what the logical error is, explain if necessary.

Well having made it work, you introduce a bug so that it doesn't work.
Then you explain your bug.

More specifically, your professor wants to know that you understand the concept of a logical bug (as opposed to a syntactic bug). The idea is that the program compiles, but does not produce the correct results.

An example: a program that is supposed to determine the maximum of 2 numbers input by the user, but instead outputs the minimum. The logical error is highlighted in red.

Code:

---

#include <iostream>
using namespace std;

int main()
{
    int i1, i2, iMax;
    cout << "Please insert your first number: ";
    cin >> i1;
    cout << endl << "Please insert your second number: ";
    cin >> i2;

    iMax = i1;
    if (i2 < i1)
        iMax = i2;
    cout << endl << "The highest number was " << iMax << endl;

    return 0;
}

---

Vey helpful.