EBK STARTING OUT WITH PYTHON
3rd Edition
ISBN: 9780100794351
Author: GADDIS
Publisher: YUZU
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Textbook Question
Chapter 6.1, Problem 8CP
What is the purpose of opening a file?
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I would like to get help to resolve the following case
Last Chance Securities
The IT director opened the department staff meeting today by saying, "I've got some good news and
some bad news. The good news is that management approved the payroll system project this morning.
The new system will reduce clerical time and errors, improve morale in the payroll department, and avoid
possible fines and penalties for noncompliance. The bad news is that the system must be installed by
January 1st in order to meet new federal reporting rules, all expenses from now on must be approved in
advance, the system should have a modular design if possible, and the vice president of finance would
like to announce the new system in a year-end report if it is ready by mid-December."
Tasks
1. Why is it important to define the project scope? How would you define the scope of the payroll
project in this case?
2. Review each constraint and identify its characteristics: present versus future, internal versus exter-
nal, and mandatory versus desirable.
3. What…
2. Signed Integers
Unsigned binary numbers work for natural numbers, but many calculations use negative
numbers as well. To deal with this, a number of different methods have been used to represent
signed numbers, but we will focus on two's complement, as it is the standard solution for
representing signed integers.
2.1 Two's complement
• Most significant bit has a negative value, all others are positive. So, the value of an n-digit
-2
two's complement number can be written as: Σ2 2¹ di 2n-1 dn
• Otherwise exactly the same as unsigned integers.
i=0
-
• A neat trick for flipping the sign of a two's complement number: flip all the bits (0 becomes 1,
or 1 becomes 0) and then add 1 to the least significant bit.
• Addition is exactly the same as with an unsigned number.
2.2 Exercises
For questions 1-3, answer each one for the case of a two's complement number and an
unsigned number, indicating if it cannot be answered with a specific representation.
1. (15 pts) What is the largest integer…
Chapter 6 Solutions
EBK STARTING OUT WITH PYTHON
Ch. 6.1 - What is an output file?Ch. 6.1 - What is an input file?Ch. 6.1 - What three steps must be taken by a program when...Ch. 6.1 - Prob. 4CPCh. 6.1 - Prob. 5CPCh. 6.1 - When writing a program that performs an operation...Ch. 6.1 - If a file already exists, what happens to it if...Ch. 6.1 - What is the purpose of opening a file?Ch. 6.1 - What is the purpose of closing a file?Ch. 6.1 - Prob. 10CP
Ch. 6.1 - In what mode do you open a file if you want to...Ch. 6.2 - Write a short program that uses a for loop to...Ch. 6.2 - Prob. 13CPCh. 6.2 - Assume the file data.txt exists and contains...Ch. 6.2 - Prob. 15CPCh. 6.3 - Prob. 16CPCh. 6.3 - Prob. 17CPCh. 6.3 - Prob. 18CPCh. 6.4 - Prob. 19CPCh. 6 - A file that data is written to is known as...Ch. 6 - A file that data is written to is known as...Ch. 6 - Before a file can be used by a program, it must be...Ch. 6 - When a program is finished using a file, it should...Ch. 6 - The contents of this type of file can be viewed in...Ch. 6 - This type of file contains data that has not been...Ch. 6 - When working with this type of file, you access...Ch. 6 - When working with this type of file, you can jump...Ch. 6 - This is a small holding section" in memory that...Ch. 6 - This marks the location of the next item that will...Ch. 6 - When a file is opened in this mode, data will be...Ch. 6 - This is a single piece of data within a record. a....Ch. 6 - Prob. 13MCCh. 6 - Prob. 14MCCh. 6 - Prob. 15MCCh. 6 - When working with a sequential access file, you...Ch. 6 - When you open a file that file already exists on...Ch. 6 - The process of opening a file is only necessary...Ch. 6 - Prob. 4TFCh. 6 - When a file that already exists is opened in...Ch. 6 - Prob. 6TFCh. 6 - You can have more than one except clause in a...Ch. 6 - Prob. 8TFCh. 6 - Prob. 9TFCh. 6 - Describe the three steps that must be taken when a...Ch. 6 - Why should a program close a file when it's...Ch. 6 - What is a read position? where is the read...Ch. 6 - If an existing file is opened in append mode, What...Ch. 6 - If a file does not exist and a program attempts to...Ch. 6 - Write a program that opens an output file with the...Ch. 6 - Write a program that opens the my_name.txt file...Ch. 6 - Write code that does the following: opens an...Ch. 6 - Prob. 4AWCh. 6 - Modify the code that you wrote in problem 4 so it...Ch. 6 - Write code that opens an output file with the...Ch. 6 - A file exists on the disk named students. txt. The...Ch. 6 - A file exists on the disk named students txt. The...Ch. 6 - Prob. 9AWCh. 6 - Prob. 10AWCh. 6 - File Display Assume a file containing a series of...Ch. 6 - File Head Display Write a program that asks the...Ch. 6 - Line Numbers Write a program that asks the user...Ch. 6 - Item Counter Assume a file containing a series of...Ch. 6 - Sum of Numbers Assume a file containing a series...Ch. 6 - Average of Numbers Assume a file containing a...Ch. 6 - Random Number File Writer Write a program that...Ch. 6 - Random Number File Reader This exercise assumes...Ch. 6 - Prob. 9PECh. 6 - Golf Scores The Springfork Amateur Golf Club has a...
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- can u solve this questionarrow_forward1. Unsigned Integers If we have an n-digit unsigned numeral dn-1d n-2...do in radix (or base) r, then the value of that numeral is n−1 r² di Σi=0 which is basically saying that instead of a 10's or 100's place we have an r's or r²'s place. For binary, decimal, and hex r equals 2, 10, and 16, respectively. Just a reminder that in order to write down a large number, we typically use the IEC or SI prefixing system: IEC: Ki = 210, Mi = 220, Gi = 230, Ti = 240, Pi = 250, Ei = 260, Zi = 270, Yi = 280; SI: K=103, M = 106, G = 109, T = 10¹², P = 1015, E = 10¹8, Z = 1021, Y = 1024. 1.1 Conversions a. (15 pts) Write the following using IEC prefixes: 213, 223, 251, 272, 226, 244 21323 Ki8 Ki 223 23 Mi 8 Mi b. (15 pts) Write the following using SI prefixes: 107, 10¹7, 10¹¹, 1022, 1026, 1015 107 10¹ M = 10 M = 1017102 P = 100 P c. (10 pts) Write the following with powers of 10: 7 K, 100 E, 21 G 7 K = 7*10³arrow_forwardanswer shoul avoid using AI and should be basic and please explainarrow_forward
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- answer should avoid using AI (such as ChatGPT), do not any answer directly copied from AI would and explain codearrow_forwardWrite a c++ program that will count from 1 to 10 by 1. The default output should be: 1, 2, 3, 4, 5, 6 , 7, 8, 9, 10 There should be only a newline after the last number. Each number except the last should be followed by a comma and a space. To make your program more functional, you should parse command line arguments and change behavior based on their values. Argument Parameter Action -f, --first yes, an integer Change place you start counting -l, --last yes, an integer Change place you end counting -s, --skip optional, an integer, 1 if not specified Change the amount you add to the counter each iteration -h, —help none Print a help message including these instructions. -j, --joke none Tell a number based joke. So, if your program is called counter, counter -f 10 --last 4 --skip 2 should produce 10, 8, 6, 4 Please use the last supplied argument. If your code is called counter, counter -f 4 -f 5 -f 6 should count from 6. You should…arrow_forwardshow workarrow_forward
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