Write a program that uses the function isPalindrome given in Example 6-6 (Palindrome). Test your program on the following strings: madam, abba, 22, 67876, 444244, trymeuemyrt Modify the function isPalindrome of Example 6-6 so that when determining whether a string is a palindrome, cases are ignored, that is, uppercase and lowercase letters are considered the same. The isPalindrome function from Example 6-6 has been included below for your convenience.

bool isPalindrome(string str) { int length = str.length();

for (int i = 0; i < length / 2; i++) { if (str[i] != str[length - 1 - i] ) return false; }

return true; }