faultexample.java

国外的数据结构与算法分析用书

import java.io.*;

public class FaultExample
{
	public static void main(String[ ] args) throws IOException
	{
		int[ ] marks = new int[100]; // the marks
		int numMarks; // actual number of marks
		int sum = 0; // sum of the marks
		float average; // average of the marks
		int numAbove; // number of marks above average
		int numBelow; // number of marks below average
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		
		/*	Step 1: Read the marks. */
		System.out.println("Enter the marks (enter -1 to finish input)");
		numMarks = 0;
		do
		{
			marks[numMarks++] = Integer.parseInt(br.readLine());
		} while (marks[numMarks - 1] != -1);

		/*	Step 2: Compute and display average. */
		for (int i = 0; i < numMarks; i++)
			sum += marks[i];
		average = (float) sum / numMarks;
		System.out.println("The average mark is " + average +".");
		
		/*	Step 3: Count and display the number of marks above and below average. */
		numAbove = 0;
		numBelow = 0;
		for (int i = 0; i < numMarks; i++)
			if (marks[i] >= average)
				numAbove++;
			else
				numBelow++;
		System.out.println("There were " + numAbove + " marks above or the same as the average.");
		System.out.println("There were " + numBelow + " marks above or the same as the average.");
	}
}