1. INF 260 - 002 – Object-Oriented Programming - I - Fall 2012
Project #2
*Due 11/5/2012, Monday, 10:00AM
IMPORTANT: You can use any IDE for creating your programs.
Create the programs and save them. Compile and run the
programs. Save the screenshot of the successfully run programs
and submit the screenshots with the corresponding source code
files .
Programs should be well-commented to make their
understanding easy. Variable-names should be so chosen that it
is easily to visualize what is going on.
7.14/256 (Exploring matrix) Write a program that prompts the
user to enter of a square matrix, randomly fills in 0s and 1s into
the matrix, prints the matrix, finds the row, columns, and
diagonals with all 0s or 1s. Here is a sample run of the program.
Enter the size for the matrix: 4 —Enter
0111
0000
0100
1111

2. All 0s on row 1
All 1s on row 3
No same numbers on a column
No same numbers on the major diagonal
No same numbers on the sub-diagonal
20x1
7.17/257-258 (Financial tsunami) Banks lend money to each
other. In tough economic times, if a bank goes bankrupt, it may
not be able to pay back the loan. A bank's total assets are its
current balance plus its loans to other banks. Figure 7.8 is a
diagram that shows five banks. The banks' current balances are
25, 125, 175, 75, and 1.81 million dollars, respectively. The
directed edge from node 1 to node 2 indicates that bank 1 lends
40 million dollars to bank 2.
FIGURE 7.8 Banks lend money to each other.
If a bank's total assets are under a certain limit, the bank is
unsafe. The money it borrowed cannot be returned to the lender,
and the lender cannot count the loan in its total assets.
Consequently, the lender may also be unsafe, if its total assets
are under the limit. Write a program to find all unsafe banks.
Your program reads the input as follows. It first reads two
integers n and limit, where n indicates the number of banks and
limit is the minimum total assets for keeping a bank safe. It
then reads n lines that describe the information for n banks with
id from 0 to n-1. The first number in the line is the bank's
balance, the second number indicates the number of banks that
borrowed money from the bank, and the rest are pairs of two

3. numbers. Each pair describes a borrower. The first number in
the pair is the borrower's id and the second is the amount
borrowed. For example, the input for the five banks in Figure
7.8 is as follows (note that the limit is 201):
5 201
25 2 1 100.5 4 320.5
125 2 2 40 3 85
175 2 0 125 3
75 75 1 0 125
181 1 2 125
The total assets of bank 3 are (75 + 125), which is under 201.
So, bank 3 is unsafe. After bank 3 becomes unsafe, the total
assets of bank 1 fall below (125 + 40). So, bank 1 is also
unsafe. The output of the program should be
Unsafe banks are 3 1
(Hint: Use a two-dimensional array borrowers to represent
borrowers[i][j] indicates the loan that bank i loans to bank j.
Once becomes unsafe, borrowers[i][j] should be set to 0.)
20x1
8.1/296 (The Rectangle class) Following the example of the
Circle class in 8.2, design a class named Rectangle to represent
a rectangle. The class contains:
· Two double data fields named width and height that specify
the wid and height of the rectangle. The default values are 1 for

4. both width and height.
· A no-arg constructor that creates a default rectangle.
· A constructor that creates a rectangle with the specified width
and height.
· A method named getArea() that returns the area of this
rectangle.
· A method named getPerimeter() that returns the perimeter.
Implement the class. Write a test program that creates two
Rectangle objects—one with width 4 and height 40 and the
other with width 3.5 and height 35.9. Display the width, height,
area and perimeter of each rectangle in this order.
20x1
8.7/297 (The Account class) Design a class named Account that
contains:
· A private int data field named id for the account (default 0).
· A private double data field named balance for the account
(default 0).
· A private double data field named annualInterestRate that
stores the current interest rate (default 0). Assume all accounts
have the same interest rate.
· A private Date data field named dateCreated that stores the
date when the account was created.

5. · A no-arg constructor that creates a default account.
· A constructor that creates an account with the specified id and
initial balance.
· The accessor and mutator methods for id, balance, and
annualInterestRate.
· The accessor method for dateCreated.
· A method named getMonthlyInterestRate() that returns the
monthly interest rate.
· A method named withdraw that withdraws a specified amount
from the account.
· A method named deposit that deposits a specified amount to
the account.
Implement the class. Write a test program that creates an
Account object with an account ID of 1122, a balance of
$20,000, and an annual interest rate of 4.5%. Use the withdraw
method to withdraw $2,500, use the deposit method to deposit
$3,000, and print the balance, the monthly interest and the date
when this account was created.
20x1
PS: Be sure to follow the instructions related to Input/Output,
coding conventions, directions on comments, naming
conventions, indentation, spacing, block styles and what to turn
in – as specified after assignment 1 while writing your
programs.

6. ***
i will pay whatever it takes