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Palindrome without using string functions in C

#include <stdio.h>
#include <string.h>
 
int main()
{
   char text[100];
   int begin, middle, end, length = 0;
 
   gets(text);
 
   while ( text[length] != '\0' )
      length++;
 
   end = length - 1;
   middle = length/2;
 
   for( begin = 0 ; begin < middle ; begin++ )
   {
      if ( text[begin] != text[end] )
      {
         printf("Not a palindrome.\n");
         break;
      }
      end--;
   }
   if( begin == middle )
      printf("Palindrome.\n");
 
   return 0;
}