Assignment 11
Due Thursday, May 17 at 1:20pm on Canvas
Assignment 11.1: Weight in Space (10 pts)
- Remember our class activity where we calculated a user's weight on the moon?
- Let's see if we can expand it to provide more options for the user.
- Instead, we will calculate how the user's weight changes on different planets.
- Working by yourself, create a Java project called Planet.
- Our assignment will make use of many of the skills we have already learned:
- Switch statements
- Logical Operators
- Strings and String comparison
- Arithmetic operators and expressions
- Begin your program by declaring a double variable named weight, and a String variable named planet.
- You will need to write a switch statement with a series of cases, like the following:
switch(planet) {
case "Mercury":
weight *= MERCURY_MULT; //0.38
break;
//rest of cases
}
- Your default clause gives you the opportunity to do some error checking on the user input.
- If
the user inputs an invalid planet, you should output the message "You
entered an invalid name for a planet. Please re-run the program to try
again."
- To provide the proper weight, you will need to know the conversion rate for each of the planets. The conversion is as follows:
- Mercury - multiply by 0.38
- Venus - multiply by 0.91
- Mars - multiply by 0.38
- Jupiter - multiply by 2.54
- Saturn - multiply by 1.08
- Uranus - multiply by 0.91
- Neptune - multiply by 1.19
- Pluto - multiply by 0.06
- Note that to avoid magic numbers, you will need to declare a final variable for each of the multipliers above. Your final variables should look like this:
final double MERCURY_MULT = 0.38;
- Important: The output for the weight should only have one number after the decimal point. Therefore, you need to make use of System.out.printf to print out the weights rather than println
- Your program should work identically to the following, except user input will vary:
Welcome!
What do you weigh on other planets?
Enter your weight in pounds: 123
Now, select from one of the following planets:
Mercury
Venus
Mars
Jupiter
Saturn
Uranus
Neptune
Pluto
Please enter the planet: Mercury
You weigh 46.7 lbs on Mercury
- Alternately, your program should output the following if the user provides an invalid entry:
Welcome!
What do you weigh on other planets?
Enter your weight in pounds: 123
Now, select from one of the following planets:
Mercury
Venus
Mars
Jupiter
Saturn
Uranus
Neptune
Pluto
Please enter the planet: Marz
You entered an invalid planet name.
Please rerun the program to try again.
Assignment 11.1: What's Your Sign? (10 pts)
- For this assignment, let's write an astrology program.
- Welcome the user (see sample output below)
- Prompt the user to enter a numerical value (1-12) for the month of his/her birth (see sample output)
- Prompt the user to enter a numerical value (1-31) for the day of his/her birth (see sample output)
- Then, determine the user's sign based on their input.
Aries March 21-April 19
Taurus April 20-May 20
Gemini May 21 - June 21
Cancer June 22 - July 22
Leo July 23 - August 2
Virgo August 23 - September 22
Libra September 23 - October 22
Scorpio October 23 - November 21
Sagittarius November 22 - December 21
Capricorn December 22 - January 19
Aquarius January 20 - February 18
Pisces February 19 - March 20
- Expect to need to use if, else if and else statements.
- Expect to use logical operators (&&, ||).
- Submit your source code in a file called Sign.java to Canvas when finished
Your sample output must be identical to mine:
What's your sign?
Please enter the month of your birth (1-12): 3
Please enter the day of your birth (1-31): 3
Your Sign is Pisces.
Alternately,
What's your sign?
Please enter the month of your birth (1-12): 4
Please enter the day of your birth (1-31): 12
Your Sign is Aires.
Alternately,
What's your sign?
Please enter the month of your birth (1-12): 100
Please enter the day of your birth (1-31): -2
Invalid Entry. Please run the program to try again.