Download the sample Ratings.txt file from NUoodle and put it in the same directory as numbers.txt above. Now you'll modify your code above to do a few things using this file. The file contains 100 lines of data in the following format, with the three elements separated by tab characters: 1) A user ID (in this lab, all of the user IDs are between 1 and 5) 2) A nine-digit song ID 3) A song rating between 0 and 100 or 255. A rating of 0 means they hated it, 100 means they love it, and other variables between those two mean something in between. The value 255 is special and indicates that they want to skip the song without rating it. For example, the first line in the file is: 1 1000125 90 Write C++ code to read every line from the file and collect each of these three items. For now, even though we're collecting them, we will not use the user ID and song ID. After the program has read all 100 lines, it should calculate and print the average rating to two decimal places, ignoring values of 255. So if there were four ratings of 100, one rating of 0, and one rating of 255 (which is ignored), the average should be 80.00: (100+100+100+100+0)/5

Download the sample Ratings.txt file from NUoodle and put it in the same directory as numbers.txt above. Now you'll modify your code above to do a few things using this file. The file contains 100 lines of data in the following format, with the three elements separated by tab characters: 1) A user ID (in this lab, all of the user IDs are between 1 and 5) 2) A nine-digit song ID 3) A song rating between 0 and 100 or 255. A rating of 0 means they hated it, 100 means they love it, and other variables between those two mean something in between. The value 255 is special and indicates that they want to skip the song without rating it. For example, the first line in the file is: 1 1000125 90 Write C++ code to read every line from the file and collect each of these three items. For now, even though we're collecting them, we will not use the user ID and song ID. After the program has read all 100 lines, it should calculate and print the average rating to two decimal places, ignoring values of 255. So if there were four ratings of 100, one rating of 0, and one rating of 255 (which is ignored), the average should be 80.00: (100+100+100+100+0)/5

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

See similar textbooks

Similar questions

R-Studio 1.) You have an airport routes.csv file that contains 3409 airports, each row has a 3-letter code and the number of routes. Example: Airport NumberOfRoutes AAE 9 AAL 20 AAN 2 AAQ 3 AAR 8 AAT 2 AAX 1 AAY 1 ABA 4 ABB 2 ABD 6 ABE 13 ABI 2 ABJ 49 ABL 4 ABM 1 ABQ 42 ABR 1 ABS 1 ABT 3 ABV 30 ABX 4 ABY 4 ABZ 41 ACA 8 ACC 54 ACE 116 ACH 2 ACI 2 ACK 6 ACR 2 ACT 2 ACU 1 ACV 3 ACX 6 ACY 10 ACZ 1 ADA 17 ADB 66 ADD 105 ADE 23 ADF 2 ADK 1 ADL 51 ADQ 11 ADU 3 ADZ 11 AEB 3 AEP 65 For this dataset, consider the following models:(a) Suppose the given data points follow a power law distribution. Estimate the corresponding α parameter. (b) Suppose the given data points follow an exponential distribution. Estimate the corresponding λ parameter. (c) Suppose the given data points follow a uniform distribution. Estimate the corresponding range parameters [a, b] of the uniform distribution.(d)…
Please please with this using java
What color does the following code make? r = random.randrange(256) g = random.randrange(256) b = random.randrange(256) color = color_rgb(b, b, b) black blue usually a gray, but could be white or black white
Please give correct code. Thanks
Java : Create a .txt file with 3 rows of various movies data of your choice in the following table format: Movie ID number of viewers rating release year Movie name 0000012211 174 8.4 2017 "Star Wars: The Last Jedi" 0000122110 369 7.9 2017 "Thor: Ragnarok" Create a class Movie which instantiates variables corresponds to the table columns. Implement getters, setters, constructors and toString. Implement 2 readData() methods : the first one will return an array of Movies and the second one will return a List of movies . Test your methods.
this is my code so far but it its not accurate, not sure if i should def function and then for loop? import csv with open ('TopUni.csv', mode='r') as csv_file: csvReader = csv.reader(csv_file) line = [] for line in csvReader: sum(line) print(line)
You are given 2 text files named drywet.txt and wetwet.txt. wetwet.txt data file refers to the probability of next day being a wet day if the current day is wet. drywet.txt data file refers to the probability of next day being a wet day if the current day is dry. NOTE: the data for the same location in wetwet.txt and drywet.txt will have the same line number. These files are in the format of: (excerpt from wetwet.txt)-97.58 26.02 0.76 0.75 0.77 0.74 0.80 0.86 0.94 0.97 0.89 0.77 0.74 0.77 -97.19 26.03 0.73 0.76 0.75 0.71 0.79 0.85 0.92 0.95 0.90 0.81 0.76 0.75 -98.75 26.35 0.74 0.76 0.76 0.73 0.67 0.84 0.83 0.85 0.80 0.71 0.71 0.76 … In each line, the first and second numbers represent the location’s longitude and latitude. The following 12 numbers represent the probability of the next day being a wet day of the month. For example, on the first line of the excerpt above 0.75 means that in February (4th column), there is a 75% of chance that the next day is a wet day if today is a wet…
Add a prompt to ask the user to input their last name (no spaces ; please use underscores if needed), age and a balance of their choice. Create a new entry in the patient_list array with this information [Important note: you can statically modify the code to have the patient_list array hold an extra entry ; no need to do any dynamic memory allocation to accommodate the new entry]. #include <iostream> #include <cstdlib> #include <cstring> using namespace std; // Declaring a new struct to store patient data struct patient { int age; char name[20]; float balance; }; // TODO: // IMPLEMENT A FUNCTION THAT COMPARES TWO PATIENTS BY AGE // THE FUNCTION RETURNS AN INTEGER AS FOLLOWS: // -1 IF THE AGE OF THE FIRST PATIENT IS LESS // THAN THE SECOND PATIENT'S AGE // 0 IF THE AGES ARE EQUAL // 1 OTHERWISE // TODO: // IMPLEMENT A FUNCTION THAT COMPARES TWO PATIENTS BY BALANCE DUE // THE FUNCTION RETURNS AN INTEGER AS…
Output should be 5. Please help me find my error, and create 5 tests below in a seperate file using the corrected code. Thanks. 1. create a strawberryStand object2. create one or more MenuItem objects and add them to the strawberryStand's menu3. create a dictionary of sales for the day that includes sales of at least one item that isn't in the menu4. try calling enter_sales_for_today(), passing that sales dictionary as the argument5. If an InvalidSalesItem is raised, it should be caught with a try/except that prints an explanatory message for the user (otherwise the function should proceed normally). class MenuItem: def __init__(self, name, wholesale_cost, selling_price): self.name = name self.wholesale_cost = wholesale_cost self.selling_price = selling_price def get_name(self): return self.name def get_wholesale_cost(self): return self.wholesale_cost def get_selling_price(self): return self.selling_price class SalesForDay:…
DO NOT COPY FROM OTHER WEBSITES Correct and detailed answer will be Upvoted else downvoted. Thank you!
You have more flexibility to implement your own function names and logic in these programs. The data files you need for this assignment can obtained from:Right-click and "Save Link As..." HUGO_genes.txt (Links to an external site.) chr21_genes.txt (Links to an external site.) Create an output directory inside your assignment4 directory called "OUTPUT" for result files, so that they will not mix with your programs. Output from your programs will be here! Your program must implement command line options for the infiles it must open, but for testing purposes it should run by default, so if no command line option is passed at the command line, the program will still run. This will help in the grading of your program. Create a Python Module called called my_io.py - You can use the same code from assignment 3's solution. Put this my_io.py Module in a subdirectory named assignment4 inside your assignment4 top-level directory (see the tree below, and see Lecture 7 on how to implement a…
Create a datafile that contains the first name, last name, gender, age, height, smoking preference, eye color and phone number. Add a variety of records to the file. A sample file looks like: Write a program that opens the file and reads the records one by one. The program will skip any records where the gender preference is not a match. Of those records that match the gender preference, check to see if the age and height are between the maximum and minum preferences. Then check to see if the smoking preference and eye color are also a match. If at least 3 of the remaining fields match, consider the record a partial match, and print it in the report. If all 4 of the remaining fields match, the record is a perfect match and print it in the report with an asterisk next to it. At the end of the program, close the file and report how many total records there were of the specified gender, how many were a partial match, and how many were a perfect match.