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lines changed Original file line number Diff line number Diff line change 11public class Exercise {
2-
2+
33 public static void zoop () {
44 baffle ();
55 System .out .print ("You wugga " );
66 baffle ();
77 }
8-
8+
99 public static void main (String [] args ) {
1010 System .out .print ("No, I " );
1111 zoop ();
1212 System .out .print ("I " );
1313 baffle ();
1414 }
15-
15+
1616 public static void baffle () {
1717 System .out .print ("wug" );
1818 ping ();
1919 }
20-
20+
2121 public static void ping () {
2222 System .out .println ("." );
2323 }
24-
24+
2525}
Original file line number Diff line number Diff line change @@ -13,7 +13,7 @@ public static void main(String[] args) {
1313 double radians = Math .toRadians (180.0 );
1414 double degrees2 = Math .toDegrees (Math .PI );
1515 long x = Math .round (Math .PI * 20.0 );
16-
16+
1717 double x2 = Math .cos (angle + Math .PI / 2.0 );
1818 double x3 = Math .exp (Math .log (10.0 ));
1919 double x4 = Math .pow (2.0 , 10.0 );
Original file line number Diff line number Diff line change 44 * Examples from Chapter 5.
55 */
66public class Conditional {
7-
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88 public static void main (String [] args ) {
99 String fruit1 = "Apple" ;
1010 String fruit2 = "Orange" ;
1111 System .out .println (fruit1 .equals (fruit2 ));
12-
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1313 int x = 17 ;
1414 int n = 18 ;
15-
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1616 if (x > 0 ) {
1717 System .out .println ("x is positive" );
1818 }
19-
19+
2020 if (x % 2 == 0 ) {
2121 System .out .println ("x is even" );
2222 } else {
2323 System .out .println ("x is odd" );
2424 }
25-
25+
2626 if (x > 0 ) {
2727 System .out .println ("x is positive" );
2828 } else if (x < 0 ) {
2929 System .out .println ("x is negative" );
3030 } else {
3131 System .out .println ("x is zero" );
3232 }
33-
33+
3434 if (x == 0 ) {
3535 System .out .println ("x is zero" );
3636 } else {
@@ -40,17 +40,17 @@ public static void main(String[] args) {
4040 System .out .println ("x is negative" );
4141 }
4242 }
43-
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4444 boolean evenFlag = (n % 2 == 0 ); // true if n is even
4545 boolean positiveFlag = (x > 0 ); // true if x is positive
46-
46+
4747 if (evenFlag ) {
4848 System .out .println ("n was even when I checked it" );
4949 }
50-
50+
5151 if (!evenFlag ) {
5252 System .out .println ("n was odd when I checked it" );
5353 }
5454 }
55-
55+
5656}
Original file line number Diff line number Diff line change 11public class Exercise {
2-
2+
33 public static void zoop (String fred , int bob ) {
44 System .out .println (fred );
55 if (bob == 5 ) {
@@ -8,21 +8,21 @@ public static void zoop(String fred, int bob) {
88 System .out .println ("!" );
99 }
1010 }
11-
11+
1212 public static void main (String [] args ) {
1313 int bizz = 5 ;
1414 int buzz = 2 ;
1515 zoop ("just for" , bizz );
1616 clink (2 * buzz );
1717 }
18-
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1919 public static void clink (int fork ) {
2020 System .out .print ("It's " );
2121 zoop ("breakfast " , fork ) ;
2222 }
23-
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2424 public static void ping (String strangStrung ) {
2525 System .out .println ("any " + strangStrung + "more " );
2626 }
27-
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2828}
Original file line number Diff line number Diff line change 11import java .util .Scanner ;
22
33public class Logarithm {
4-
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55 public static void main (String [] args ) {
66 System .out .println ("printLogarithm" );
77 printLogarithm (3.0 );
8-
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99 System .out .println ("scandouble" );
1010 scanDouble ();
11-
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1212 System .out .println ("scandouble2" );
1313 scanDouble2 ();
1414 }
15-
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1616 public static void printLogarithm (double x ) {
1717 if (x <= 0.0 ) {
1818 System .err .println ("Error: x must be positive." );
@@ -21,14 +21,14 @@ public static void printLogarithm(double x) {
2121 double result = Math .log (x );
2222 System .out .println ("The log of x is " + result );
2323 }
24-
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2525 public static void scanDouble () {
2626 Scanner in = new Scanner (System .in );
2727 System .out .print ("Enter a number: " );
2828 double x = in .nextDouble ();
2929 printLogarithm (x );
3030 }
31-
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3232 public static void scanDouble2 () {
3333 Scanner in = new Scanner (System .in );
3434 System .out .print ("Enter a number: " );
@@ -40,5 +40,5 @@ public static void scanDouble2() {
4040 double x = in .nextDouble ();
4141 printLogarithm (x );
4242 }
43-
43+
4444}
Original file line number Diff line number Diff line change 11public class Recursion {
2-
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33 public static void main (String [] args ) {
44 System .out .println ("countdown" );
55 countdown (3 );
6-
6+
77 System .out .println ("countup" );
88 countup (3 );
9-
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1010 System .out .println ("newLine" );
1111 newLine ();
12-
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1313 System .out .println ("nLines" );
1414 nLines (3 );
15-
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1616 System .out .println ("threeLine" );
1717 threeLine ();
18-
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1919 System .out .println ("displayBinary" );
2020 displayBinary (23 );
2121 System .out .println ();
2222 }
23-
23+
2424 public static void countdown (int n ) {
2525 if (n == 0 ) {
2626 System .out .println ("Blastoff!" );
@@ -29,29 +29,29 @@ public static void countdown(int n) {
2929 countdown (n - 1 );
3030 }
3131 }
32-
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3333 public static void newLine () {
3434 System .out .println ();
3535 }
36-
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3737 public static void threeLine () {
3838 newLine ();
3939 newLine ();
4040 newLine ();
4141 }
42-
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4343 public static void nLines (int n ) {
4444 if (n > 0 ) {
4545 System .out .println ();
4646 nLines (n - 1 );
4747 }
4848 }
49-
49+
5050 public static void forever (String s ) {
5151 System .out .println (s );
5252 forever (s );
5353 }
54-
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5555 public static void countup (int n ) {
5656 if (n == 0 ) {
5757 System .out .println ("Blastoff!" );
@@ -60,12 +60,12 @@ public static void countup(int n) {
6060 System .out .println (n );
6161 }
6262 }
63-
63+
6464 public static void displayBinary (int value ) {
6565 if (value > 0 ) {
6666 displayBinary (value / 2 );
6767 System .out .print (value % 2 );
6868 }
6969 }
70-
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7171}
Original file line number Diff line number Diff line change 11public class Exercise {
2-
2+
33 public static void main (String [] args ) {
44 boolean flag1 = isHoopy (202 );
55 boolean flag2 = isFrabjuous (202 );
@@ -12,7 +12,7 @@ public static void main(String[] args) {
1212 System .out .println ("pong!" );
1313 }
1414 }
15-
15+
1616 public static boolean isHoopy (int x ) {
1717 boolean hoopyFlag ;
1818 if (x % 2 == 0 ) {
@@ -22,7 +22,7 @@ public static boolean isHoopy(int x) {
2222 }
2323 return hoopyFlag ;
2424 }
25-
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2626 public static boolean isFrabjuous (int x ) {
2727 boolean frabjuousFlag ;
2828 if (x > 0 ) {
@@ -32,5 +32,5 @@ public static boolean isFrabjuous(int x) {
3232 }
3333 return frabjuousFlag ;
3434 }
35-
35+
3636}
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