Check if a word is a Palindrome in C

#include < stdio.h>
#include < stdlib.h>
#include < string.h>

int est_palidrome(char *str)
{
bool result = false;
//if the word contains no more than 1 character
if(strlen(str) <= 1)
result = true;

//otherwise if the first character
matches the latest
else if(str[0] == str[strlen(str)-1])
{
//le First and the last character
are checked so they are eliminated
char temp[strlen(str)-2];
//memcpy allows you to copy a part
str in temp
-2: the '\0' + the last character eliminated
memcpy( temp, & str[1], strlen(str) - 2 );
// '\0' indicates the boundary
temp[strlen(str) - 2] = '\0';
//recursive call
result = est_palidrome(temp);
}
return result;
}

int main()
{
char str[20];
printf("Enter a string.\n");
scanf("%s",str);

if(est_palidrome(str))
printf("It's a palindrome!\n");
else
printf("It's not a palindrome! \n");
system("pause");
}