Hello I have been working on this program for a few days and have gotten stuck. I allow the user to enter in a string and remove special characters and turn upper case characters to lower case. after all that is done i compare the characters in the string to see if it is a palindrome. My program keeps returning "not a palindrome" any help would be much appreciated thank you.
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
char removing_char (char *str)
{
char *p1=str;
char *p2=str;
p1 = str;
while(*p1 != 0)
{
if(ispunct(*p1) || isspace(*p1))
{
++p1;
}
else
*p2++ = *p1++;
}
*p2=0;
return 0;
}
char change_capt (char *str)
{
int i;
for(i=0; str[i] != '\0'; i++)
{
str[i] = tolower(str[i]);
}
return 0;
}
int ispalindrome (char *str, int length)
{
if(str[0] == str[length-1])
{
return ispalindrome(str+1, length-2);
}
else
return 0;
}
int main(void)
{
char str[256];
int result;
printf("Please enter your string:\n");
fgets(str, 256, stdin);
change_capt (str);
removing_char(str);
result = ispalindrome(str, strlen(str));
if(result == 1)
{
printf("This is a Palindrome string\n");
}
else
printf("This is not a Palindrome string\n");
exit(0);
}
