21. Consider the following method: public static void sketch(int x1, int y1, int x2, int y2, int n) ( if (n <= 0) O (E) else. ( } drawLine(x1, y1, x2, y2); Assume that the screen looks like a Cartesian coordinate system with the origin at the center, and that drawLine connects (x1,y1) to (x2,y2). Assume also that x1, y1, x2, and y2 are never too large or too small to cause errors. Which picture best represents the sketch drawn by the method call sketch(a, 0, -a, 0, 2) where a is a positive integer? (A) int xm (x1 + x2 + y1 - y2) / 2; int ym (y1 + y2 + x2-x1) / 2; sketch(x1, y1, xm, ym, n - 1); sketch (xm, ym, x2, y2, n - 1); -a y y a X (B) (D) -a -a -a a y
21. Consider the following method: public static void sketch(int x1, int y1, int x2, int y2, int n) ( if (n <= 0) O (E) else. ( } drawLine(x1, y1, x2, y2); Assume that the screen looks like a Cartesian coordinate system with the origin at the center, and that drawLine connects (x1,y1) to (x2,y2). Assume also that x1, y1, x2, and y2 are never too large or too small to cause errors. Which picture best represents the sketch drawn by the method call sketch(a, 0, -a, 0, 2) where a is a positive integer? (A) int xm (x1 + x2 + y1 - y2) / 2; int ym (y1 + y2 + x2-x1) / 2; sketch(x1, y1, xm, ym, n - 1); sketch (xm, ym, x2, y2, n - 1); -a y y a X (B) (D) -a -a -a a y
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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Question
Transcribed Image Text:21. Consider the following method:
public static void sketch(int x1, int y1, int x2, int y2, int n)
(
if (n <= 0)
O
else
(
}
drawLine(x1, y1, x2, y2);
Assume that the screen looks like a Cartesian coordinate
system with the origin at the center, and that drawLine
connects (x1,y1) to (x2,y2). Assume also that x1, y1, x2,
and y2 are never too large or too small to cause errors.
Which picture best represents the sketch drawn by the
method call
int xm
(x1 + x2 + y1 - y2) / 2;
int ym (y1 + y2 + x2-x1) / 2;
sketch(x1, y1, xm, ym, n - 1);
sketch (xm, ym, x2, y2, n - 1);
sketch(a, 0, -a, 0, 2)
where a is a positive integer?
(A)
<-a
y
-a
y
a
X
(B)
(D)
-a
-a
y
+
-a
-a
a
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