// file: guard.c
                #include <stdio.h>
                #include <string.h>
                
                int main() {
                    char granted = 0;
                    char passwd[7];
                    printf("Password: ");
                    gets(passwd);
                    if (!strcmp(passwd, "pa$$wd")) {
                        granted = 1;
                    }
                    if (granted == 1) {
                        printf("Access granted!\n");
                    }
                    return 0;
                }