Starting Out with C++: Early Objects Plus MyLab Programming with Pearson eText -- Access Card Package (9th Edition)
9th Edition
ISBN: 9780134520520
Author: Tony Gaddis, Judy Walters, Godfrey Muganda
Publisher: PEARSON
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Chapter 9, Problem 13PC
Using Files-Birthday List
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stats.py: We can create a numpy array from separate lists by specifying a format for each field:arr = np.zeros(4, dtype={'names': ('name', 'age', 'major', 'gpa'),
'formats': ('U50', 'i4', 'U4', 'f8')})arr['name'] = ['Alice', 'Bob', 'Carol', 'Dennis']arr['age'] = [21, 25, 18, 29]arr['major'] = ['CS', 'Math', 'Chem', 'Phys']arr['gpa'] = [3.8, 3.2, 4.0, 3.5]
where U50 is a string of max length 50, i4 is a 4-byte integer, U4 is a string of max length 4, and f8 is an 8-byte floating-point number. Then arr has value
array([('Alice', 21, 'CS', 3.8), ('Bob', 25, 'CS', 3.2),('Carol', 18, 'Chem', 4. ), ('Dennis', 29, 'Phys', 3.5)],dtype=[('name', '<U50'), ('age', '<i4'), ('major', '<U4'), ('gpa', '<f8')])
Then, for example, arr[’name’] will give an array of just the student names.Write a program that reads the file roster2.dat that has this format:
name,age,major,gpa
Convert this to a numpy array as shown above. Then use that array to compute…
JAVA PROGRAM
Chapter 7. PC #16. 2D Array Operations with Additional Requirements
Write a program that creates an ArrayList of ArrayList of Doubles. The program should ask the user to enter the filename from the keyboard and validate the file for existence. Once the file is verified, the program should load the two-dimensional ArrayList with test data from the file. Be careful, as some of the files will contain rows with different number of elements. The program should work regardless whether the input data is perfectly rectangular or ragged. The program should have the following methods:
• main. Main entry point for the program.
• getRowSubtotal. This method should accept a two-dimensional ArrayList as its first argument and an integer as its second argument. The second argument should be the index of the row in the ArrayList. The method should return the subtotal of the values in the specified row.
• getColSubtotal. This method should accept a two-dimensional ArrayList as…
JAVA PROGRAM
Chapter 7. PC #16. 2D Array Operations with Additional Requirements
Write a program that creates an ArrayList of ArrayList of Doubles. The program should ask the user to enter the filename from the keyboard and validate the file for existence. Once the file is verified, the program should load the two-dimensional ArrayList with test data from the file. Be careful, as some of the files will contain rows with different number of elements. The program should work regardless whether the input data is perfectly rectangular or ragged. The program should have the following methods:
• main. Main entry point for the program.
• getRowSubtotal. This method should accept a two-dimensional ArrayList as its first argument and an integer as its second argument. The second argument should be the index of the row in the ArrayList. The method should return the subtotal of the values in the specified row.
• getColSubtotal. This method should accept a two-dimensional ArrayList as…
Chapter 9 Solutions
Starting Out with C++: Early Objects Plus MyLab Programming with Pearson eText -- Access Card Package (9th Edition)
Ch. 9.2 - Prob. 9.1CPCh. 9.2 - Prob. 9.2CPCh. 9.2 - Prob. 9.3CPCh. 9.2 - Prob. 9.4CPCh. 9.3 - True or false: Any sort can be modified to sort in...Ch. 9.3 - Prob. 9.6CPCh. 9.3 - Prob. 9.7CPCh. 9.3 - Prob. 9.8CPCh. 9.3 - Prob. 9.9CPCh. 9.6 - Prob. 9.10CP
Ch. 9.6 - Prob. 9.11CPCh. 9.6 - Prob. 9.12CPCh. 9.6 - Prob. 9.13CPCh. 9.6 - Prob. 9.14CPCh. 9.6 - Prob. 9.15CPCh. 9 - Prob. 1RQECh. 9 - Prob. 2RQECh. 9 - Prob. 3RQECh. 9 - Prob. 4RQECh. 9 - Prob. 5RQECh. 9 - Prob. 6RQECh. 9 - Prob. 7RQECh. 9 - A binary search will find the value it is looking...Ch. 9 - The maximum number of comparisons that a binary...Ch. 9 - Prob. 11RQECh. 9 - Prob. 12RQECh. 9 - Bubble sort places ______ number(s) in place on...Ch. 9 - Selection sort places ______ number(s) in place on...Ch. 9 - Prob. 15RQECh. 9 - Prob. 16RQECh. 9 - Why is selection sort more efficient than bubble...Ch. 9 - Prob. 18RQECh. 9 - Prob. 19RQECh. 9 - Prob. 20RQECh. 9 - Prob. 21RQECh. 9 - Charge Account Validation Write a program that...Ch. 9 - Lottery Winners A lottery ticket buyer purchases...Ch. 9 - Lottery Winners Modification Modify the program...Ch. 9 - Batting Averages Write a program that creates and...Ch. 9 - Hit the Slopes Write a program that can be used by...Ch. 9 - String Selection Sort Modify the selectionSort...Ch. 9 - Binary String Search Modify the binarySearch...Ch. 9 - Search Benchmarks Write a program that has at...Ch. 9 - Sorting Benchmarks Write a program that uses two...Ch. 9 - Sorting Orders Write a program that uses two...Ch. 9 - Ascending Circles Program 8-31 from Chapter 8...Ch. 9 - Modified Bin Manager Class Modify the BinManager...Ch. 9 - Using Files-Birthday List Write a program that...Ch. 9 - Prob. 14PCCh. 9 - Using Files-String Selection Sort Modification...Ch. 9 - Using Vectors String Selection Sort Modification...
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