Assertions
Category: Assertions
Author: Stuart Reges
Book Chapter: 5.5
Problem: Assertions
You will identify various assertions as being either always true, never true or sometimes true/sometimes false at various points in program execution. The comments in the method below indicate the points of interest.
public static void mystery(Scanner console) {
int x = 0;
int y = 1;
int next = console.nextInt();
<span class="assertionpoint">// Point A
while (next != 0) {
<span class="assertionpoint">// Point B
y = y * next;
if (next < 0) {
x++;
<span class="assertionpoint">// Point C
}
next = console.nextInt();
<span class="assertionpoint">// Point D
}
<span class="assertionpoint">// Point E
System.out.println(y + " " + x);
}
1) next < 0
2) next == 0
3) x > 0