Question

Write a function that, given a user’s name and a book’s title, returns the rating that the user gave for that book.

• Your function MUST be named getRating.

• Your function should take 6 input arguments in the following order:

  • string: username

  • string: title of the book

  • Array of User objects: users

  • Array of Book objects: books

  • int: number of users currently stored in the users array

  • int: number of books currently stored the books array

• The username and book title search should be case insensitive. “Ben, “ben” and “BEN” are one and the same user.

• If both the user name and the book title are found in the arrays, then the function should return the user’s rating value for that book title.

• The function should return the following values depending on cases:

  • Return the rating value if both user and title are found

  • Return -3 if the user or the title are not found

Answer 1

bool stringComp(const string &s1, const string &s2) {
    if (s1.size() != s2.size())  return false;
    for (string::const_iterator c1 = s1.begin(), c2 = s2.begin(); c1 != s1.end(); ++c1, ++c2) {
        if (tolower(*c1) != tolower(*c2))
            return false;
    }
    return true;
}

int getRating(const string& userName, const string& title, string users[], string titles[], int ratings[][50], int numUsers, int numBooks) {
    int userIndex = -1;
    for (int i = 0; i < numUsers; i++)
        if (stringComp(userName, users[i]))
            userIndex = i;
    int titleIndex = -1;
    for (int i = 0; i < numBooks; i++)
        if (stringComp(title, titles[i]))
            titleIndex = i;
    if (userIndex == -1 || titleIndex == -1)
        return -3;
    return ratings[userIndex][titleIndex];
}