• Be sure to read the "Individual Work" section of your green sheet. You may not copy your work from another student. You may not collaborate with other students, except on Piazza. When code is posted on Piazza, it is usually far from perfect and should not be copied without improving it. If you do copy from Piazza, you MUST provide attribution. Use the format

  // https://piazza.com/class#fall2012/cs46a/911

Part A. A Bank class has an array of BankAccount references. Implement the constructor, which takes an integer parameter indicating the number of bank accounts in the bank, and the initial balance for all accounts. Also implement the methods

• public double getBalance(int index)

  Returns 0 if index is not valid.

• public void transfer(int fromIndex, int toIndex, double amount)

  Does nothing if fromIndex or toIndex is not valid.

• public void addInterest(double percent)

  Adds the interest to all accounts.

Draft: Implement the constructor and the getBalance method.

netbrat draft | final

Part B. In the Sequence class, add methods

• public boolean isSorted()

  Returns true if the sequence is sorted in increasing (or, technically, nondecreasing) order

• public int firstDecreasingPosition()

  Returns the first index where values[i] > values[i + 1], or -1 if the sequence is sorted

• public void sort()

  Sorts this sequence. Keep calling firstDecreasingPosition and swap until the sequence is sorted.

• String toString()

  Returns a string with all values, separated by commas

Draft: Just implement isSorted.

netbrat draft | final

Part C. In the Polynomial class, add methods

• public double sumOfCoefficients()
• public double alternatingSumOfCoefficients()

  The alternating sum coeff[0] - coeff[1] + coeff[2] - coeff[3] ...

• public String prettyToString()

  A string describing the polynomial in the form such as 10x³-x+2.5. Use Unicode superscripts for the exponents (except for the x¹ and x⁰ terms). Separate terms by + or -. Don't show terms with zero coefficients. Don't show a coefficient of 1 in front of an x. Show integers without .0.

Draft: sumOfCoefficients. Hint: There is a reason I give you at.

netbrat draft | final