#include <stdio.h>
int match(char *s1, char *s2) {
  while( *s1 != '\0' && *s2 != 0 && *s1 == *s2 ){
    s1++; s2++;
  }
  return( *s1 - *s2 );
}
void welcome(char *str) { printf(str); }
void goodbye(char *str) { void exit(); printf(str); exit(1); }
main(){
	char name[128], pw[128]; /* passwords are eight characters - double this */
	char *good = "Welcome to The Machine!\n";
	char *evil = "Invalid identity, exiting!\n";

	printf("login: "); scanf("%s", name);
	printf("password: "); scanf("%s", pw);
	if( match(name,pw) == 0 )
		welcome( good );
	else
		goodbye(evil );
}