Programming & Computer Science Answers

Preserving the Gene Pool

by CodeChum Admin

In order to make sure that the future generations will grow into great beings, we must make sure that the gene pool consists of the best genes. In order to do that, we must compare genes from each other and find out which one is the best!

Instructions:

In the code editor, you are provided with a main() function that asks the user for 4 integer inputs and passes these to the getBest() function call.

Your task is to declare and define this getBest() function which has the following details:

Return type - int

Name - getBest

Parameters - 4 integers

Description - returns the highest integer passed

DO NOT EDIT ANYTHING IN THE MAIN

Input

1. First integer

2. Second integer

3. Third integer

4. Fourth integer

Output

Enter·a:·10

Enter·b:·3

Enter·c:·15

Enter·d:·14

Highest·integer·=·15

Pairing Up

by CodeChum Admin

You’re tasked with pairing up people with each other but you need to figure out how well both of them work together. In order to find out how effective each pair is, you need to create a program that adds both of their values and returns their sum.

Instructions:

In the code editor, you are provided with a main() function that asks the user for two integer inputs, passes these to a function called, getSum(), and then prints the returned value.

Your task is to declare and define the getSum() function which has the following details:

Return type - int

Name - getSum

Parameters - 2 integers

Description - adds the passed integers and returns their sum

DO NOT EDIT ANYTHING IN THE MAIN

Input

1. First integer

2. Second integer

Output

Enter·first·number:·24

Enter·second·number:·21

Sum·=·45

Survival of the Biggest (JAVA)

by CodeChum Admin

Looping a number and taking away each digit of it is so much fun, but I wanted to try out a much more complex task: getting the largest digit among them all.

Think you can handle the job?

Instructions:

1. Input a non-zero positive integer.
2. Using the same concept as the previous problem, figure out how to separate the digits of a number and determine which of the digits is the largest one, using a while. Afterwards, print the largest digit.
3. Tip #1: Create another variable that will hold the largest digit. Initial its value to a negative integer, like -1, outside the loop.
4. Tip #2: Everytime you get the rightmost digit, check if it is greater than the current largest digit. If it is, set it as the new largest digit.

Input

A line containing an integer.

214

Output

A line containing an integer.

4

Problem:

Compute and display the output of the Area (A) of a rectangle, based on

inputted value for length (L) and the width (W).

Formula: A = L * W

Create a short program that will print 123467.89 as currency using NumberFormat.

Sample Output:

------------------------------------------------------------------

I have ₱1,234,567.89 in my bank account.

Create a short program that will generate a random number from 0 to 100 while using Math.random and Math.round command.

Submit your answers by attaching a screenshot of your program's source code and 3 screenshot of it's output.

Write a program that declares and initializes an array of 7 integers. The program uses these static methods to perform different operations on the array:

void printArray(int[] arr) – takes the array as parameter and prints the array in horizontal order

int sumOfArray(int[] arr) – takes the array as parameter and returns the sum of the array

int getHighest(int[] arr) – takes the array as parameter and returns the highest value in the array

int resetArray(int[] arr) – takes the array as parameter and resets the value of each element to 0

Sample output:

Here’s the array: 

3 1 3 2 1 9 1

Sum: 20

Highest: 9

Here’s the array: 

0 0 0 0 0 0 0

• Do the calculations on Matlab, print it out and then write your answers on the attached answer

sheet.

• Attach your Matlab printout to your answer sheet before you hand in.

1. Find all solutions for each of the following systems of equations (if the system is consistent):

(a) 6.5x − 2y = 7 (b) 3.5x1 + 4.5x2 + 5.5x3 = 11

2x − 0.75y = 1.75 x1 + 4x2 − 7x3 = −16

12x − y = 21 0.5x1 − 0.75x2 + 0.75x3 = 3.5

(c) − 0.75x1 + 0.75x2 = −6

2.5x1 + 2x2 − 4.5x3 = 2

1.25x1 + 1.25x2 − 2.5x3 = 0

(d) 3.4x1 + 3.4x2 − 15.3x3 = −20.4

0.5x1 + 0.25x2 − 0.75x3 = 1

0.75x1 + 0.5x2 − 1.5x3 = 1

Please note: You should use Matlab to write your systems in reduced row echelon form, but have to

interpret the results and give the solution(s) if the system is consistent.