int main(void)
{
	char palindrome[80];
	int ispalindrome=1;/*boolean value True*/
	int i=0;
	int j=0;

/* get the user input */
	do{

	printf("Enter a string no more than 80 characters ");
	fgets(palindrome,80,stdin);
	j = strlen(palindrome) - 1;
	i = 0;
 /* Remove the trailing newline*/
	 void  remove_newline( char* palindrome ){
       char* p = 0 ;
	   if( p = strrchr( palindrome, '\n' ) )
       *p = '\0' ;
	 }
	int string_length=strlen(palindrome);
	 if(palindrome[string_length-1]=='?'||palindrome[string_length-1]=='!'
	 ||palindrome[string_length-1]=='.'){
		 
  /*If the last character is a ?,!or . continue with normal operation*/
   
	j=string_length-1;
	i = 0;

	if(j>80){
 /*finds out if characters or more than 80*/
	printf("Error your characters cannot be more than 80");
	}

	while((i <= j && ispalindrome && isalpha(i) && isalpha(j) )){
		if(tolower (palindrome[i]) != tolower(palindrome[j])) {
      ispalindrome = 0;

		} 
		i++;
		 j--;
	}
  		if(ispalindrome) {
		printf("%s is a palindrome!\n", palindrome);
		}
		else {
    printf("sorry, %s is not a palindrome\n", palindrome);
  } 
	 }
	 else
		 printf("Your input must be terminated by a punctuation mark");
	}
	}while(j>80);
  
return 0;
}