Consider the C/C++ function f() given below:

void f(char w[])
{
    int x = strlen(w); // length of the string
    char c;
    for (int i = 0; i < x; i++)
    {
        c = w[i];
        w[i] = w[x − i − 1];
        w[x − i − 1] = c;
    }
}

Which of the following is the purpose of f()?

1. AIt outputs the contents of the array in reverse order.
2. BIt outputs the contents of the array in the original order.
3. CIt outputs the contents of the array with the characters shifted over by one position.
4. DIt outputs the contents of the array with the characters rearranged so they are no longer recognized as the words in the original phrase.

Pick an option to check yourself, or open the answer below.

Show answer & explanation

Correct answer: B. It outputs the contents of the array in the original order.

Explanation

The loop runs over the whole string, so each pair is swapped twice (once at i and again at x − i − 1). The string ends up in its original order.