1 Computer Networks And The Internet 2 Application Layer 3 Transport Layer 4 The Network Layer: Data Plane 5 The Network Layer: Control Plane 6 The Link Layer And Lans 7 Wireless And Mobile Networks 8 Security In Computer Networks 9 Multimedia Networking Chapter1: Computer Networks And The Internet
1.1 What Is The Internet? 1.2 The Network Edge 1.3 The Network Core 1.4 Delay, Loss, And Throughput In Packet-switched Networks 1.5 Protocol Layers And Their Service Models 1.6 Networks Under Attack 1.7 History Of Computer Networking And The Internet 1.8 Summary Chapter Questions Section: Chapter Questions
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C program
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Expert Q&A
Done
2) Implement this C program using at least three arrays to store the interest, principle
and balance for each payment respectively. For example, interest[0] stores the paid
interest in the first payment. Name this C program as loanCalcArr.c.
3) Implement this C program using at least three arrays to store the interest, principle
and balance after each payment respectively. For example, interest[0] stores the paid
interest in the first payment. Besides, please use three pointers to visit the element in
the three arrays separately. Name this C program as loanCalcPtr.c.
4) Implement this C program by defining a structure for each payment. The structure
should have at least three members for the interest, principle and balance separately.
And store all the payments in a structure array (the max size of which could be 100).
Name this C program as loanCalcstruct.e
In this C program, the input and output are defined as following:
• Input: amount of loan, interest rate per year and number of payments
• Output: a table of amortization schedule (also called payment schedule) containing
payment number, monthly payment, principal paid, interest paid and new balance at
each row.
The attached screenshot below shows a sample of the output.
Yuans-MacBook-Pro:PC yuanlong$ ./Loancale
Enter amount of loan : $ 500
Enter Interest rate per year :7.5
Enter number of payments : 5
Montly payment should be 101.88
Payment
$101.88
$101.88
$101.88
$101.88
$101.88
AMORTIZATION SCHEDULE
Principal
$98.76
$99.38
$100.00
$100.62
$101.25
Interest
$3.12
$2.51
$1.89
$1.26
$0.63
Balance
$401.24
$301.87
$201.87
$101.25
$0.00
Note
• monthly payments are equal. The way to calculate monthly payment and other values
for each row are provided in Appendix.
• The C program can be implemented within 80 lines of code. If your program is longer
than 80 lines, you may need to think about how to simplify your program.
Hint: To print out a percentage %, please use %%. You may need to use C math library to
calculate the powers of numbers. To compile a C program using math library, you must add
option Im at the end of the cc command to link math library. Eg. gce -o test test.c -Im
1. Calculating the monthly payment.
(Note: The following instruction is from
http://woww.vertex42.com/ExcelArticles/amortization-calculation html )
The formula for calculating the payment amount is shown below.
r(1 +r)"
A = B
(1+r)" – 1
where
• A- payment Amount per period (monthly payment)
• Be initial Balance (loan amount)
• r interest rate per period
• n total number of payments or periods
Example 1: What would the monthly payment be on a 5-year, $20,000 car loan with a
nominal 7.5% annual interest rate?
B-$20,000
r= 7.5% per year /12 months = 0.625%- 0.00625 per period
n-5 years 12 months 60 total periods
A- 20000. (1es - 400.76
0.002s (1
(1+0.00 -
2. Calculating the Principal(P), Interest(INT) and Balance(B) for each
раyment.
The formula is shown below.
INT(n) = B(n - 1) r
P(n) -A- INT (n):
B(n) = B(n - 1)- P(n):
Where INT (n), P(m) and B(n) are the paid principal, paid interest and new balance for the
nth payment. And B(0) means the loan amount.
Process by which instructions are given to a computer, software program, or application using code.
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