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MIDTERM EXAM
Second Summer 2003 |
class One { int a; static int b; void fun(One other) { this.a = this.a + 2; other.a = other.a + 3; One.b = One.b + 1; System.out.println (this.a + " " + other.a + " " + One.b); } public static void main(String[] args) { One potato = new One(); One tomato = new One(); tomato.fun(potato); tomato.fun(potato); tomato.fun(tomato); potato.fun(potato); potato.fun(tomato); tomato.fun(new One()); (new One()).fun(potato); (new One()).fun(new One()); } } lh102sun.cs.indiana.edu%javac One.java lh102sun.cs.indiana.edu%java One 2 3 1 4 6 2 9 9 3 11 11 4 13 12 5 14 3 6 2 16 7 2 3 8 lh102sun.cs.indiana.edu%
class Two { public static void main(String[] args) { System.out.println(2 / 3 + " " + 2 % 3); System.out.println(('A' - 'C') * 10 % 8); int x = 1, y = 1; if (x > 2) { y = 2; y = y + 1; } else y = y + 1; System.out.println(y); if (x < 2) y = 2; else y = y + 1; y = y - 1; System.out.println(y); for (int i = -7; i <= 12; i = i + 4) System.out.print("?"); System.out.println("!"); for (int i = -12; i <= 6; i = i + 9) { System.out.print("?"); System.out.println("!"); } if (false) x = 2; else if (true) x = 3; else x = 1; if (x == 3) System.out.println("How are you?"); System.out.println("Not bad..."); for (int i = 0; i < 3; i++) { x = x + y; y = x - y; x = x - y; System.out.println("(" + x + ", " + y + ")"); } if (false && false || true) System.out.println("Good bye!"); } } lh102sun.cs.indiana.edu%javac Two.java lh102sun.cs.indiana.edu%java Two 0 2 -4 2 1 ?????! ?! ?! ?! How are you? Not bad... (1, 3) (3, 1) (1, 3) Good bye! lh102sun.cs.indiana.edu%
class Three { public static void main(String[] args) { int x = 3 % 5, y = 5 / 3; while (x >= 0 || y >= 0 && (y - x) < 100) { x = x / 3 - 7 * y; y = 3 * y - 2 / x; System.out.println("(" + x + ", " + y + ")"); } Three tomato = new Three(); Three potato = new Three(1); for (potato.fun(); tomato.a * Three.b < 6; tomato.fun()) { potato.nuf(); tomato.nuf(); x = x + 1; } } int a; static int b; void fun() { this.a = this.a + 1; Three.b = Three.b - 2; System.out.println("(" + a + ", " + b + ")"); } void nuf() { this.a = this.a - 2; Three.b = Three.b + 1; System.out.println("(" + a + ", " + b + ")"); } Three() { System.out.println("-----------------------"); } Three(int value) { this.a = value; } } lh102sun.cs.indiana.edu%javac Three.java lh102sun.cs.indiana.edu%java Three (-6, 3) (-23, 9) (-70, 27) (-212, 81) ----------------------- (2, -2) (0, -1) (-2, 0) (-1, -2) (-2, -1) (-3, 0) (-2, -2) (-4, -1) (-4, 0) (-3, -2) lh102sun.cs.indiana.edu%
class Four { public static void main(String[] args) { System.out.println(false && true); System.out.println(true && (false || true)); System.out.println(! (true || false)); System.out.println(! (false && true)); System.out.println(! true && (false || ! true)); System.out.println (! (false && (! true || false))); System.out.println( ! (false && (! true || ! (true && ! false)))); for (int i = 0; i < 5; i++) { Four.fun(i); System.out.println(); } } static void fun(int x) { if (x > 0) System.out.print(x + 1); else if (x > 1) System.out.print(x); if (x > 2) System.out.print(x - 1); else if (x > 3) System.out.print(2 * x); else System.out.print(x * x); } } lh102sun.cs.indiana.edu%javac Four.java lh102sun.cs.indiana.edu%java Four false true false true false true true 0 21 34 42 53 lh102sun.cs.indiana.edu%
class Five { public static void main(String[] args) { for (int i = 0; i < 10; i++) { System.out.println(Five.fun(i)); } } static int fun(int x) { if (x % 2 == 0) return (x + 1); else if (x % 3 == 1) return (x); if (x % 5 == 2) return (x - 1); else if (x > 3) return (x); else return (2 * x); } } lh102sun.cs.indiana.edu%javac Five.java lh102sun.cs.indiana.edu%java Five 1 1 3 6 5 5 7 7 9 9 lh102sun.cs.indiana.edu%