| Java 1 Coin Assignments |
BACKGROUND - Make sure that you have 3 constructors. (See handout 6.) PROCESS TO FOLLOW - Use correct style and write comments! (Remember when
and WHEN NOT to indent.) YOUR TASK Write each application class in the Coin project with
the names C1, C2, etc. The output from the terminal window should be copied
and pasted AT THE TOP your application program. If you
do the extra credit, call your class Purse. |
C1 - Write an application program that creates a penny, nickel
and dime and flips them 100 times. Create the penny using the default
constructor. Create the nickel using the constructor that takes a String
as the parameter and create the dime using the constructor that takes
a double as the parameter. You should have four int
variables: numLoops should be declared outside the
loop (and set equal to 100). Your program should also have numHeadsPenny,
numHeadsNickel, numHeadsDime, all should be declared outside the loop
(and initialized to 0.) Count the number of heads for each coin. Note: You will
NOT create a variable for the number of tails. (Math will assist
you in figuring this out.)
Program Output: The number of heads and tails that came up for each coin.
| SAMPLE OUTPUT |
| ==================This
is program C1================== Penny: 57 Heads and 43 tails. Nickel: 47 Heads and 53 tails. Dime: 58 Heads and 42 tails. ====================================================== |
C2 - Write an application program that creates two pennies
and flips them 1000 times. Count the number of times they both came up heads
ON THE SAME TOSS (Use a compound conditional.). In other words,
inside a for loop, flip each one and ask if on that flip they both
were heads.
Program Output: The number of times they were BOTH heads (on the same flip.) What percent that was. (See box below.)
| SAMPLE OUTPUT |
| ==================This is program C2================== They both came up heads: 263 times out of 1000 tosses. That is the equivalent of 26.3% of the time. ====================================================== |
C3 - Write an application program that creates a random handful
of coins (an ArrayList) using the following algorithm:
1. Choose a random number between 2 and 10 for the number of coins.
2. In a loop for that many times, choose another random number between 1 and
5. You will need to store this number in a variable. DECLARE this variable outside
the loop! You will then re-assign its value every iteration of the for loop.
(In other words, don't write int typeOfCoin = ________;
in the loop, just have typeOfCoin = ________;
(remove the data type declaration.)
3. If this number is a 1 create a penny, if it is a 2 create a nickel, a 3 create
a dime, a 4 create a quarter and a 5 create a half-dollar.
4. AFTER THE LOOP, do the printing. (Do NOT do
it inside the for loop that creates the coins.)
Program Output: How many coins will be added. The names of each coin. The total value of your handful of coins. (Use DecimalFormat [in the Coin class] for correct printing of the dollar amount
| SAMPLE OUTPUT |
| ==================This is program C3================== 3 coins will be added to your handful. I am a penny worth $0.01 dollars. I am a quarter worth $0.25 dollars. I am a penny worth $0.01 dollars. Your coins are worth a total of $0.27 ===================================================== |
public void addPennies(int count) // Each add method should create new coins
of the proper
public void addNickels(int count) // name and value
public void addDimes(int count)
public void addQuarters(int count) and
public int getValue() // returns the amount of money in the purse in cents
Use this for your main method (C4)
Purse shoulderbag = new Purse();
shoulderbag.addPennies (8);
shoulderbag.addNickels(3);
shoulderbag.addDimes(4);
shoulderbag.addQuarters(6);
System.out.println(“The purse contains “ + shoulderbag.getValue()
+ “ cents” );
//add code here to print out value in dollars and cents ( $2.13)