Software Engineering for Students A Programming Approach

198 Chapter 14 ■ The basics
Answers to self-test questions
14.1 When some input from the user’s keyboard is required. It must be
checked and, if necessary, new input solicited until the input is correct.
14.2 int[] table;
boolean search(int wanted) {
boolean found = false;
int i = 0;
}
endSearch:
while (i < table.length) {
if (table[i] == wanted) {
found = true;
break endSearch;
}
i++;
}
return found;
Without using break:
int[] table;
boolean search(int wanted) {
boolean found = false;
int i = 0;
}
while (i < table.length and found == false) {
if (table[i] == wanted)
found = true;
else
i++;
}
return found;
14.3 Yes and no.
Clearly these operations are not something that should be allowed
with integers and reals.
But in Java the bit structure of these data types is precisely defined.
Also the effects of these operations are precisely defined. So these particular
data types have an extended set of valid operations.