#include<stdio.h>
#define TRUE 1
#define FALSE 0


int main(void)
{
    char phrase[101];

    printf("Enter phrase: ");
    fgets(phrase, 101, stdin);

    printf("%s\n", phrase);
    make_copy_of_string(phrase, phrase_copy);
    keep_chars(phrase_copy);
    conver_upper_to_lower(phrase_copy);

if(palindromeness(phrase_copy) == TRUE)
{
    printf("\nThe phrase:   %s\n is a palindrome.\n", phrase);

}else{
    printf("\nThe phrase:   %s\n is not a palindrome.\n", phrase);

}
    return 0;

}
void make_copy_of_string(char str[], char str_copy[])
{
    int i=0;

    while(str[i] != '\n' && str[i] != '\0')
    {
        str_copy[i] = str[i];
        i++;
    }
    str_copy[i] = '\0';
    str[i] = '\0';
}
void keep_chars(char string[])
{
    int i=0, j=0;
    while(string[i] != '\0')
    {
        if( ('A'<=string[i] && string[i] <= 'Z') || ('a'<= string[i] && string[i]<='z') )
        {
            string[j] = string[i];
            i++;
            j++;
        }else{
            i++;
        }
    } //end while loop
    string[j] = '\0';
}
void convert_upper_to_lower_case(char string[])
{
    int i=0, j=0;
    while(string[i] != '\0')
    {
        if( ('A'<= string[i] && string[i] <= 'Z') )
        {
            string[i]='\0';
        }
    }
}