Often the number of times a loop is executed is not predetermined. You may use an input value to signify the end of the loop. Such a value is known as a sentinel value. Write a program that reads and calculates the sum of an unspecified number of integers. The input 0 signifies the end of the input.

Often the number of times a loop is executed is not predetermined. You may use an input value to signify the end of the loop. Such a value is known as a sentinel value. Write a program that reads and calculates the sum of an unspecified number of integers. The input 0 signifies the end of the input.

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

Python Pro 1) Write a python program that takes a person’s details (name, age and a city), and writes to a file (persons.txt) using a loop repeatedly. You should write three person’s to the file. The program terminates on entering any key by the user, except on (Y or y) key. Sample output of the first run of the program is shown below: Enter name: JohnEnter age: 20Enter city: SydneyData saved: John 20 SydneyPress (Y or y) to add another person, or any key to exit
L E S S O N S E T5 Loops and Files Working with the while LoopBring in program while.cpp from the Lab 5 folder. (This is Sample Program 5.2from the Pre-lab Reading Assignment). The code is shown below:// PLACE YOUR NAME HERE#include <iostream>using namespace std;int main(){char letter = 'a';while (letter != 'x'){cout << "Please enter a letter" << endl;cin >> letter;cout << "The letter you entered is " << letter << endl;}return 0;}Exercise 1: This program is not user friendly. Run it a few times and explainwhy.Exercise 2: Add to the code so that the program is more user friendly.Exercise 3: How would this code affect the execution of the program if thewhile loop is replaced by a do-while loop? Try it and see.
create a new file in c++. In this lab, you will add some more functionality to the program. Use loops to keep running the program until the user chooses the exit condition (X or x). When dividing, use a loop to validate user input, making sure the denominator (second number) is not zero. If the user enters a 0 for the second number, display an error message and ask them again. A) Add two numbersB) Subtract two numbersC) Multiply two numbersD) Divide two numbersX) Exit program The program should: display a "hello" message before presenting the menu display the menu prompt user for selection accept either uppercase or lowercase for selection display error message if invalid selection is made (example: E) display the selection back to the user prompt for two numbers perform the operation and display the results use loop for input validation of second number during division display error message for division when second number is 0 after displaying result, use loop to…
pls code in pythonplagiarism: This Boolean function takes two filenames. If any line occurs in both files, return True.If not, return False. I suggest using nested loops. With nested loops, we call the loop that is in thebody of the other loop, the "inner loop". The loop that contains the inner loop is the "outer loop". Openthe second file inside the outer loop:for line1 in file1:file2 = open(fname2)for line2 in file2:Python only lets you read the file once per open, so you need this order of instructions. Make sure yourreturn False is outside of both loops. Otherwise, you will only compare the first two lines of thefiles. Make sure you close the file that gets read repeatedly after the inner loop but still inside the outerloop.Here is some (more complete) pseudocode to get you started:open file 1for line1 in file 1open file 2for line2 in file 2:if line1 == line2:return Trueclose file 2return False
Write a program using a for loop that creates a file and adds the integers 1 through 10 loop to the file. Name the file numbers. txt. Then perform the following on the file: Read all of the numbers stored in the file and calculate their total. Display all the numbers in the file and the calculated total Using a for loop add the following numbers to the file 11 through 20 Delete the following numbers from the file 16, 17, 18 (using a temp.txt file) Change the number 10 to 50 You may NOT use a LIST to solve this problem
A. Reading Data From FileCreate a file named data.dat and enter the following numeric data:10 15 11-5 7 1532 -13 1211 17 943 18 -4The file should contain three integers in each line, the integers separated by a space.There should be 5 lines of numbers in the file.2Now, write a program file called Lab9A.cpp. In this file, open the file data.dat forreading and average.dat for writing.In a loop, using three integer variables (NOT ARRAY), read the numbers to computethe average for each line. Then, write the computed average to the average.dat file.The averages must be saved in floating point format and there must be 2 numbersafter the decimal point.You MAY NOT assume there are 15 numbers in the file i.e. your program should begeneric. please use C++
CS 401 Assignment ’POLISH’ PEASANT MULTIPLICATION Write a program using a language of your choice, that multiply two integers using the “Polish Peasant Multiplication” method. OBJECTIVE: To compute the product of two integers using the ’polish peasant’ method of multiplication INPUT: A data file containing 5 pairs of positive integers to be multiplied. One pair per line, separated by a single space. USE A FOR LOOP TO CONTROL THE READING OF THE INPUT FILE OUTPUT: A data file containing the input numbers along with their product in a format of your choosing. TEST CASES: Your program should yield the correct product for the following values. Hand in the complete program input and output files for all cases. 75 40 15 999 1 1 0 0 Any two digits of your choosing RESTRICTIONS: Obviously you may NOT use the normal multiplication operator. COMMENTS ARE A MUST!!! The ’Polish Peasant’ multiplication method: The ’polish-peasant’ multiplication algorithm to multiply any two values relies on…
Computer Science C++ Create a text file "input.txt" with a certain amount of integers (you decide how many). Write a program that reads these numbers from the file, adds them, and when you have reached the end of the file, calculates the average of these numbers. Print a message and the average to the console. Code this program twice, demonstrating the two methods to detect the end of the file, part A: reading a value from Instream and storing it (boolean expression) in the while loop part B: using the eof() member function
What type of loop, such as counter control or sentinel control, will you use in each of the following situations?a. Sum the following series: 1 + (2 / 1) + (3 / 2) + (4 / 3) + (5 / 4) + ... + (10 / 9)b. Sum the following numbers, except the last number: 17, 32, 62, 48, 58, -1c. A file contains employees’ salary. Update employees’ salary.
This week’s assignments deal with files and nested loops.Input: The program prompts for the name of an input file and the name of an output file. Theinput file contains two positive (non-zero) integers, m and n, each less than 20, followed by acharacter.Output: A file containing an m × n rectangle made using the specified character.For example, if the input file contained the numbers 4 and 6 and the character ⋆ as shown below,4 6*the output file would show 4 lines of 6 stars each, as shown below:************************This program will start by opening the input file and reading the numbers and the specified charac-ter. Thereafter a nested for loop will generate the pattern. The following questions are designedto step you through the process of creating the nested loop.Pre-lab component: Question 1: Using Raptor, create a flowchart for the following process:write a specified character (denoted ch) n times on the output stream and move the cursor to thebeginning of the next line. (In…
The python function file_first_chars takes one parameter, fname, the name of a text file, and returns a string made up of the first character from each line in the file. You may assume there are no blank lines in the file. Hint: Use a for loop to iterate over the lines of the file and accumulate the string of first characters.
The function file_first_chars in python takes one parameter, fname, the name of a text file, and returns a string made up of the first character from each line in the file. You may assume there are no blank lines in the file. Hint: Use a for loop to iterate over the lines of the file and accumulate the string of first characters. NOTE: Return the function, don't print For example: Test Result print(file_first_chars("wordlist1.txt")) hsaem