Palindrome dont ignore spacing

Palindrome.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#define MAX_SIZE 100
struct
{
    int top;
    char items[MAX_SIZE];
} typedef Stack;

char pop(Stack* s)
{
    if(s->top == -1)
        return 0;
    return s->items[s->top--] ;
}

void push(Stack* s, char item)
{
    s->items[++s->top] = item;
}
int main()
{
    char orginal_string[MAX_SIZE] = {0}, final_string[MAX_SIZE] = {0};
    char *temp;
    Stack s;
    s.top = -1;
    puts("Enter a string");
    gets((char*)orginal_string);
    if(strlen(orginal_string) == 0){
        puts("Enter valid string");
        return 0;
    }
    temp = orginal_string;
    while(*temp != 0)
    {
        push(&s,*temp);
        temp++;
    }
    temp = final_string;
    while((*temp = pop(&s))){
        temp++;
    }
    *(++temp) = 0;
    
    printf("Reverse of given string is\n%s\n",(char*)final_string);
    
    if( strcmp(orginal_string, final_string) == 0)
        puts("String is a palindrome");
    else
        puts("String is not a palindrome");
        
    return 0;
}