APCS Code

@apcsbigbrain-blog

Sample code for programming assignments in AP CompSci.

128 posts

Array-2 > centeredAverage

public int centeredAverage(int[] nums) { int min = nums[0]; // initial variables to hold min/max/total values int max = nums[0]; int total = 0; for (int i = 0; i < nums.length; i++) // checks for min/max values { min = Math.min(min, nums[i]); max = Math.max(max, nums[i]); } for (int i = 0; i < nums.length; i++) // adds all array values { total += nums[i]; } return (total - min - max)/(nums.length - 2); // subtracts the largest & smallest values // and divides it by the total numbers minus 2 }

Array-2 > bigDiff

public int bigDiff(int[] nums) { int min = nums[0]; // declare variables to hold values to double check int max = nums[0];

for (int i = 0; i < nums.length; i++) { min = Math.min(min, nums[i]); // checks between current min and value at i max = Math.max(max, nums[i]); } return (max - min); // returns int value of difference }

READ ME

Please check the READ ME section for information regarding CodingBat & coding work.

Array-2 > countEvens

public int countEvens(int[] nums) { int evenNums = 0; for (int i = 0; i < nums.length; i++) // cycles through array values { if (nums[i] % 2 == 0) // if it is a multiple of 2, it is even

{ evenNums++; // adds 1 to an even number counter } } return evenNums; }

Array-1 > sum2

public int sum2(int[] nums) { if (nums.length >= 2) // if length is greater than 2, returns sum of first two values { return nums[0] + nums[1]; } else if (nums.length == 1) // if length equals 1, returns first and only value { return nums[0]; } return 0; // else returns 0 }

Array-1 > maxEnd3

public int[] maxEnd3(int[] nums) { if (nums[0] > nums[2]) // sets all to first value { int[] newNums = {nums[0], nums[0], nums[0]}; return newNums; } else { int[] newNums = {nums[2], nums[2], nums[2]}; // sets all to last value return newNums; } }

Array-1 > reverse3

public int[] reverse3(int[] nums) { int[] newNums = {nums[2], nums[1], nums[0]}; // rearranges value into new array return newNums; }

Array-1 > rotateLeft3

public int[] rotateLeft3(int[] nums) { int[] newNums = {nums[1], nums[2], nums[0]}; // rearranges value into new array return newNums; }

Array-1 > sum3

public int sum3(int[] nums) { return (nums[0] + nums[1] + nums[2]); // returns sum of array values }

Array-1 > commonEnd

public boolean commonEnd(int[] a, int[] b) { return (a[0] == b[0] || a[a.length - 1] == b[b.length - 1]); // returns true if either first characters or last characters are the same }

Array-1 > makePi

public int[] makePi() { int[] nums = {3, 1, 4}; // inserts pi values into new array return nums; }

Array-1 > sameFirstLast

public boolean sameFirstLast(int[] nums) { return (nums.length >= 1 && nums[0] == nums[nums.length - 1]); // returns true if length is greater than one and the first and last values are equal }

Array-1 > firstLast6

public boolean firstLast6(int[] nums) { return (nums[0] == 6 || nums[nums.length- 1] == 6); // returns true if first or last value is 6 }

P9E

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

public class P9E { Scanner reader = new Scanner(System.in);

public static void main(String[] args) throws IOException { System.out.println(fileContents("sample1.txt", "sober")); System.out.println(fileContents("sample1.txt", "a sober")); System.out.println(fileContents("sample2.txt", "a fish")); }

public static boolean fileContents(String fileName, String word) throws IOException { Scanner fileReader = new Scanner(new File(fileName)); String check = ""; while (fileReader.hasNext()) { check += fileReader.nextLine(); } if (check.contains(word)) { return true; } return false; } }

String-2 > countCode

public int countCode(String str) { int count = 0; for (int i = 0; i < str.length() - 3; i++) { if (str.substring(i, i + 2).equals("co") && str.charAt(i + 3) == ('e')) { count++; } } return count; }

String2 > catDog

public boolean catDog(String str) { int catCount = 0; int dogCount = 0; for (int i = 0; i < str.length() - 2; i++) { if (str.substring(i, i + 3).equals("dog")) { dogCount++; } if (str.substring(i, i + 3).equals("cat")) { catCount++; } } if (catCount == dogCount) { return true; } return false; }

String-2 > countHi

public int countHi(String str) { int count = 0; for (int i = 0; i < str.length() - 1; i++) { String testString = str.substring(i, i + 2); if (testString.equals("hi")) { count++; } } return count; }

APCS Code @apcsbigbrain-blog - Tumblr Blog | Tumgag