Question

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;
    } // if    
  } // for loop
 return true;
}// isPalindrome

Your program should print a message indicating if a string is a palindrome:

madam is a palindrome

Answer 1

bool isPalindrome(string str) 
{
    int length = str.length();
    for(int i = 0; i<length; i++){
      s[i] = tolower(s[i]);
   }
    for (int i = 0; i < length / 2; i++) {
        if (str[i] != str[length – 1 – i]) {
             return false;
        } // if    
    } // for loop
    return true;
}// isPalindrome