Fall 2020 question 6:


public static void printZipCodes(String str) {

	while(!str.equals("")) {
		
		String zipCode = str.substring(0, 5);
		
		String secondary = str.substring(6,10);

		System.out.println(zipCode + " " + secondary);

		str = str.substring(11); 

	}


    str = ""


}

import java.util.*;
import java.io.*;

public class Question7{

	public static void main(String[] args) throws Exception{

		Scanner infile = new Scanner(new File("input.txt"));
		
		PrintWriter outfile = new PrintWriter(new File("output.txt"));

		String[] names = new String[100];
		double[] avgDist = new double[100];

		int numPeople = readData(infile, names, avgDist);
		infile.close();
		printAvgData(outfile, avgDist, numPeople);

		sort(names, avgDist, numPeople);

		for(int i=0; i<numPeople; i++) {
			outfile.println(names[i] + " " + avgDist[i]);
		}
		outfile.close();

		
	}

	public static int readData(Scanner input, String[] names, double[] avgs) {

		int count = 0;
		while(count<100 && input.hasNext()) {

			names[count] = input.next();
			
			double trip1 = input.nextDouble();
			double trip2 = input.nextDouble();
			double average = (trip1 + trip2)/2.0;
				
			avgs[count] = average;

			count++;
		}
		return count;
	} 

	public static void printAvgData(PrintWriter outfile, double[] avgs, int n) {

		double total = 0.0;

		for(int i=0; i<n; i++) {
			total += avgs[i];
		}
		double overallAvg = total / n;
		
		outfile.println("The overall average is "+overallAvg);

		int countA = 0;
		int countB = 0;
		int countE = 0;

		for(int i=0; i<n; i++){
			if(avgs[i] == overallAvg) {
				countE++;
			}
			else if(avgs[i] > overallAvg) {
				countA++;
			}
			else{
				countB++;
			}

		}

		outfile.println("The number of distances above average is "+countA);
		outfile.println("The number of distances below average is "+countB);
		outfile.println("The number of distances equal to average is "+countE);
	}

	public static void sort(String[] names, double[] dist, int n) {

		for(int i=0; i<n-1; i++) {
			int index = findMax(names, i, n);
			swap(names,dist, i, index);
		}

	}

	public static int findMax(String[] names, int start, int n) {
		
		int maxIndex = start;
		for(int i=start+1; i<n; i++) {

			if(names[i].compareTo(names[maxIndex]) > 0) {
				maxIndex = i;
			}
		}
		return maxIndex;
	}

	public static void swap(String[] s, double[] d, int i, int j) {

		String tempS = s[i];
		s[i] = s[j];
		s[j] = tempS;

		double tempD = d[i];
		d[i] = d[j];
		d[j] = tempD;
	}
}


arr3 = {1, 2, 3, 4, 5}


x       y
__    ____
12     32




doTwo:

arr        x      y
(same     ___     ___
array     32       12
as 
array3)           



10   7   1   4    2    12   15   3  

1 || 7   10  4   2    12    15   3 

1 2 ||   10  4   7    12   15    3

1 2 3 || 4 7 12 15 10

1 2 3 4 || 7 12 15 10

1 2 3 4 7 || 12 15 10

1 2 3 4 7 10 || 15 12

1 2 3 4 7 10 12 15