Vertical Lines Additional Requirements

Course Coding Conventions: organizations use coding conventions to ensure

consistency in their programs and to facilitate code maintenance; in this course, we will

start using the following:

Program Description: your program must have a comment at the top briefly

describing what the program does. Usually, one sentence is enough; for

example: This program calculates the area of a circle given its radius.

Variable naming: use lower camel case; do not use underscore. Example:

total Cost instead of total$\_$cost$.$

Constant names: use all uppercase; use underscore to separate words.

Example: MAX$\_$WIDTH

Grading Criteria

Program Description: $10\%$

Program follow course coding conventions: $10\%$

Program uses only the integer type: $25\%$

Check to avoid divide by zero error: $25\%$

Accuracy of results: $30\%$

Notes:

You may only use material from Chapters $1-3$ of the eTextbook; otherwise, your

program will not be accepted.

Programs with syntax errors will not be accepted.

Email me at

FAHernandez@dcccd$.$edu if you have any questions Programming Assignment #$1$

COSC$-1437-$ Programming Fundamentals II

Dallas College $-$ Fall $2024$

Instructions

Write a Java program to determine whether two straight lines are perpendicular. The program must prompt the user for the values of $x-y$ coordinates for two points of each line. Coordinate figures must be read as integers.

Example: in the graph below, the line $AB$ is defined by the pairs: $(15,10)$ and $(49,25)$; whereas the line CD is defined by $(29,5)$ and $(32,32).$

Premises

For a line represented by two points: $(x1,y1)$ and $(x2,y2),$ the slope of such line, m $,$ is determined by:

$m=\frac{y2-y1}{x2-x1}$

Given two lines with slopes m $1$ and m $2$ respectively, the lines are perpendicular if the product of their slopes yields $-1$ :

$(m1)(m2)=-1$

The program should avoid a "divide by zero error" by checking for vertical lines. In a

vertical line: $x2=x1$; consequently: $x2-x1=0.$

Note: If one of the lines is found to be vertical$/$horizontal$,$ all the program needs to do is

check to see if the other line is horizontal$/$vertical to determine whether

they are

perpendicular or not.

Output

The program output should be either:

"Lines are perpendicular"

Or

"Lines are not perpendicular"

The program should not produce any other output. For example, if the program

detects a vertical line, do not display: "Divide by zero error" and exit. Instead, the output

should be one of the two shown above.

Sample program output

Sample Run #$1$:

Enter coordinates $(x_1,y_1,x_2,y_2)$ for the first line: $1551531$

Enter coordinates $(x3,y3,x4,y4)$ for the second line: $9163516$

Lines are perpendicular

Sample Run #$2$:

Enter coordinates $($x$1,$ y$1,$ x$2,$ y$2)$ for the first line: $13205120$

Enter coordinates $(x_3,y_3,x_4,y_4)$ for the second line: $14102635$

lines are not perpendicular

Testing

Assume two lines are represented by their coordinates, as follows:

Line $1$: $(x1,y1)$ and $(x2,y2)$

Line $2$: $(x3,y3)$ and $(x4,y4)$

Given the following values, your program should produce the corresponding output: do this in java