Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
expand_more
expand_more
format_list_bulleted
Concept explainers
Question
Which of the following reads a line of text from a sequential access file and assigns the line (excluding the newline character) to the strLine variable?
a. inFile.Read(strLine)
b. inFile.ReadLine(strLine)
c. strLine = inFile.ReadLine
d. strLine = inFile.Read(line)
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
Step by stepSolved in 3 steps
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.Similar questions
- Which of the following statements are true? A) When you open a file for reading, if the file does not exist, an error occurs. B) When you open a file for writing, if the file does not exist, a new file is created. C) When you open a file for reading, if the file does not exist, the program will open an empty file. D) When you open a file for writing, if the file exists, the existing file is overwritten with the new file. E) When you open a file for writing, if the file does not exist, an error occurs. ======================================================================================= A, B, and D only A, and E B, and D only A and B onlyarrow_forwardGiven the following, write a code SEGMENT that does the following: Creates a string variable to store a file name (to be entered by the user) Requests the input file name from the user and stores the name in a variable Opens the input file using the entered file name Tests the STATE of the file open. If the file does not open, output a message to the user exit the program Be sure to: Include the necessary header files Declare necessary variablesarrow_forward# file name: w07_markus.py## Complete the following steps:# (1) Complete the following function according to its docstring.# (2) Save your file after you make changes, and then run the file by# clicking on the green Run button in Wing101. This will let you call your# modified function in the Python shell. An asterisk * on the Wing101# w07_markus.py tab indicates that modifications have NOT been saved.# (3) Test your function in the Wing101 shell by evaluating the examples from# the docstring and confirming that the correct result is displayed.# (4) Test your function using different function arguments.# (5) When you are convinced that your function is correct, submit your# modified file to MarkUs. You can find instructions on submitting a file# to MarkUs in Week *2* Perform -> Accessing Part 2 of the# Week 2 Perform (For Credit) on PCRS.# (6) Verify you have submitted the right file to MarkUs by downloading it# and checking that the…arrow_forward
- Sample Run 2: Enter the symbol to draw the shapes: # Enter the width of the shape: 4 Enter the height of the shape: 6 #### ## ### ## Save the file as cla14.py by clicking on File on the menu bar, then click on "Save as .". Type in cla14.py as the file name in the save as dialog box. • Run your program: Hit function key to execute the program. Alternatively you can click on Run on the menu bar and select "Run Module". • If you have any errors, fix them, save the changes in the file window, and re-run the program ()arrow_forwardWhen you work with a __________ file you access data from the beginning of the file to the end of the file. a. direct access b. random access c. sequential access d. binary accessarrow_forwardIn C++ I am opening a file through a command argument and reading through it. How do you write to the file that would be opened?arrow_forward
- A student wants to write into a file called myfile, without deleting its existing content. Which one of the following functions should he or she use? f = open('myfile', 'r') f = open('myfile', 'w+b') f = open('myfile', '+') f = open('myfile', 'a')arrow_forwardIn python, which of the following opens read_it.txt for appending or reading in data test_file variable. a. text_file = open("read_it.txt", "ar") b. text_file = open("read_it.txt", "wr") c. text_file = open("read_it.txt", "a+") d. text_file = open("read_it.txt", "ra") Which one is correct? help!arrow_forwardTwo of the menu options (#2 and #3) are unfinished, and you need to complete the code necessary to write to and read from a binary file. You will need to read through the code to find the functions that are called by these options, and then supply the missing code. Please help me get menu 2 and 3 to display properly.the .cpp and .h have the information:.cpp file: // Corporate Sales Data Outputusing namespace std; #include <iostream>#include <fstream>#include <stdlib.h>#include "HeaderClassActivity1.h" int main() { Sales qtrSales[NUM_QTRS]; while (true) { cout << "Select an option: " << endl; cout << "1. Input data" << endl; cout << "2. Write data to file" << endl; cout << "3. Read data from file" << endl; cout << "4. Display sales" << endl; cout << "99. End program" << endl; int menuItem; cin >> menuItem; if (menuItem ==…arrow_forward
- When generating a test executable using cmake, header files are required in the ADD_EXECUTABLE() functions in a CMakeLists.txt file. True Falsearrow_forwardWhen I run the following code, and receive the output songs_time.txt file, it doesn't show any of the songs numbers or time remaining in the output table. I have the input songs.txt file path copied into the file_in location but don't know what is wrong. //headers files #include <iostream> #include <iomanip> #include <fstream> //using namespace using namespace std; //main() function is defined int main() { cout << "Bartleby---xxxxxxx" << endl << endl; //declaring the variables as per the requirement int song_min, song_sec, total_min, total_sec, total_time = 0, remain_time, remain_min, remain_sec; int serial_num, s_sec; //initialising the holding time of CD to 80 minutes int hold_time = (100 * 60); //reading data from the file fstream file_in("C:\Users\gabri\OneDrive\Desktop\songs.txt", ios::in); //writing data as output on the file fstream file_out("songs_time.txt", ios::out); //displaying the heading of the…arrow_forward
arrow_back_ios
arrow_forward_ios
Recommended textbooks for you
- Database System ConceptsComputer ScienceISBN:9780078022159Author:Abraham Silberschatz Professor, Henry F. Korth, S. SudarshanPublisher:McGraw-Hill EducationStarting Out with Python (4th Edition)Computer ScienceISBN:9780134444321Author:Tony GaddisPublisher:PEARSONDigital Fundamentals (11th Edition)Computer ScienceISBN:9780132737968Author:Thomas L. FloydPublisher:PEARSON
- C How to Program (8th Edition)Computer ScienceISBN:9780133976892Author:Paul J. Deitel, Harvey DeitelPublisher:PEARSONDatabase Systems: Design, Implementation, & Manag...Computer ScienceISBN:9781337627900Author:Carlos Coronel, Steven MorrisPublisher:Cengage LearningProgrammable Logic ControllersComputer ScienceISBN:9780073373843Author:Frank D. PetruzellaPublisher:McGraw-Hill Education
Database System Concepts
Computer Science
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:McGraw-Hill Education
Starting Out with Python (4th Edition)
Computer Science
ISBN:9780134444321
Author:Tony Gaddis
Publisher:PEARSON
Digital Fundamentals (11th Edition)
Computer Science
ISBN:9780132737968
Author:Thomas L. Floyd
Publisher:PEARSON
C How to Program (8th Edition)
Computer Science
ISBN:9780133976892
Author:Paul J. Deitel, Harvey Deitel
Publisher:PEARSON
Database Systems: Design, Implementation, & Manag...
Computer Science
ISBN:9781337627900
Author:Carlos Coronel, Steven Morris
Publisher:Cengage Learning
Programmable Logic Controllers
Computer Science
ISBN:9780073373843
Author:Frank D. Petruzella
Publisher:McGraw-Hill Education