
Explanation of Solution
Program code:
//include the required header files
#include <stdio.h>
#include <string.h>
Using namespace std;
//define a function is_palindrome()
int is_palindrome(char *str, int length)
{
//if the condition is true
if (str >= str + length)
{
//return 1
return 1;
}
//if the condition is false
else
{
//if the condition is true
if (!((str[0] >= 'a' && str[0] <= 'z') || (str[0] >= 'A' && str[0] <= 'Z')))
//return
return is_palindrome(str + 1, length - 1);
//if the condition is true
if (!((str[length - 1] >= 'a' && str[length - 1] <= 'z') ||
(str[length - 1] >= 'A' && str[length - 1] <= 'Z')))
//call the method by itself
return is_palindrome(str, length - 1);
//return the value
return str[0] == str[length - 1] && is_palindrome(str + 1, length - 2);
}
}
//define main function
int main()
{
//print 1 if palinddrome
cout<<"...

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Chapter 3 Solutions
Data structures and algorithms in C++
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