作者jlwhales (Juka)
看板NTU-Exam
標題[試題] 黃俊郎 97上 計算機程式設計 小考
時間Thu Nov 20 11:37:43 2008
課程名稱︰計算機程式設計
課程性質︰通識A6
課程教師︰黃俊郎
開課學院：
開課系所︰
考試日期（年月日）︰97.11.13
考試時限（分鐘）：約60分
是否需發放獎勵金：是
（如未明確表示，則不予發放）
試題 :
Problem 1 (20 pts)
The following program (AverageOfThree.java) is supposed to perform
the following tasks:
1. Ask the user to enter three integers, one by one.
2. Compute the average of the three integers
3. Print out the average.
Identify and correct the syntax and grammar errors.
public class Average{
public void main(String[] arg){
int sum = 0; ///this stores the accumulated sum
int i = 0; /* this controls # of iterations
while{i < 3}{
input =
JOptionPane.showInputDialog("Enter a number);
sum += Integer.ParseInteger(input);}
average = sum/3;
string message = "The average is: " + average + ".";
JOptionPane.showInformationMessage{
null;
message,
"Average of Three",
JOptionPan.INFORMATION_MESSAGE);
System.exit(0);
}
}
Problem 2 (30 pts)
What do the following expressions evaluate to?(int a = 3, b = 4, c = 5, d=6)
1. a+b*c
2. b-c%d
3. 45 + 42 % 5 * (23 % 3 * 2)
4. "The answer is: " + 5 % 2 + 3 / 2
5. "Good morning".indexOf("oo");
6. "Hello".equalsIgnoreCase("hell");
7. (3 * 9) > (100 % 4)
8. (a>3) && (b<5) ｜｜ !(a == b)
9. (a == b) ｜｜ ((b+c) / 3 == a)
10. (a += c) == (b *= 2)
Problem.3 (20pts+10 bonus pts)
Write a program "LargestAbsoluteOfThree.java" that performs the following
tasks:
1. Ask the user to enter three integer, say a, b, and c, one bu one.
2. Print out the largest absolute value of a, b, and c.
For example, if a=3, b=-4, and c=2, you should print out:
The largest absolute value is 4.
Bonus (10 pts): also print out which integer (1st, 2nd, or 3rd) has
the maximum value. Following the above example, you should print out:
The 2nd integer has the largest absolute value 4.
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