#include <stdio.h>

int compConstant2(const unsigned char *x,const unsigned char *y)
{
  unsigned int differentbits = 0;
  int i;

  #define F(i) differentbits |= x[i] ^ y[i];

  for (i = 0; i<8; i++) {
	  F(i);
  }
  return (1 & ((differentbits - 1) >> 8)) - 1; /* returns 0 if equal, 0xFF..FF otherwise */
}

int main(void) {
	int comp=1;
	char pw[]="secret";
	char in[7];
	int result;


	result = compConstant2(pw, in);

	printf ("%d", result);

}