ICS 103 Homework 03

السلام عليكم ورحمة الله وبركاته


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Question 1: (15 points)

A palindrome is a word, phrase, or any other sequence of letters that can be spelled the same way in
either direction. For example, “level” and “noon” are palindromes. Write a recursive logical-function
that returns 1 if the word is a palindrome and 0 otherwise. You may do it by matching the first letter
with the last, the second with the next-to-last, and so on. Matching letters should be non-casesensitive
that is upper case letters match lower case letters. Notice that a single letter is not
considered a palindrome.
Write a driver (main) function to prompt the user to enter a sentence. Use your recursive logicalfunction
to count the number of palindromes in that sentence. You need to use String Tokenization
(strtok) function to split the sentence into words.


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Question 2: (15 points)

Write a program that will generate a 5x5 2D array of random integer numbers between 0 and 100
using the function rand(). Use the function srand(time(NULL)) to generate different sequence of
numbers in each execution. Then, write 4 different void functions rotate_left(), rotate_right(),
rotate_up(), and rotate_down() to rotate the array left, right, up, or down, respectively. The
functions take a 2D array and its size as input arguments. When rotating a 2D array to the right, all
the elements in the 1st column moves to the 2nd, all the elements in the 2nd column moves to the 3rd,
…, and all the elements in the last column moves to the 1st. Similarly, rotating left, rotating up, and
rotating down functions work.
Write also a function to print the 2D array in an organized way. Prompt the user to enter the
direction as character: ‘r’ for right, ‘l’ for left, ‘u’ for up, or ‘d’ for down. Then, print the rotated array
as requested.