public class HelloWorld {
??? public static void main(String[] args) {
??boolean a = true; // a同意
??boolean b = false; // b反對
??boolean c = false; // c反對
??boolean d = true; // d同意
???? System.out.println((a&&b)+"未通過"）;
??????? System.out.println((a||b)+"通過"）;
??????? System.out.println((!a)+"未通過"）;
??????? System.out.println((c ^ d)+"未通過"）;
???
?}
}