palindrome.c

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

int is_palindrome(char* word)
{
  int length = strlen(word);

  for (int i = 0; i < length; ++i) {
    for (int j = (length - 1); j > i; --j) {
      if (tolower(word[i]) != tolower(word[j])) {
        return 0;
      }
      return 1;
    }
  }
}

int main(int argc, char *argv[])
{
  for (int i = 1; i < argc; ++i) {
    if (is_palindrome(argv[i])) {
      printf("%s\n", argv[i]);
    }
  }

  return 0;
}