Which of the follow are true about variables? Choose all that apply. variables are names bound to values in memory variables are automatically assigned a default value of their data type after declaration variables are assigned an initial value and then cannot be reassigned variables can be used to store intermediate results of computations variable names are governed by the rules of identifiers

Which of the follow are true about variables? Choose all that apply. variables are names bound to values in memory variables are automatically assigned a default value of their data type after declaration variables are assigned an initial value and then cannot be reassigned variables can be used to store intermediate results of computations variable names are governed by the rules of identifiers

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Description: Which of the follow are true about variables? Choose all that apply.variables are names bound to values in memoryvariables are automatically assigned a default value of their data type after declarationvariables are assigned an initial value and the

Programming Logic & Design Comprehensive

9th Edition

ISBN:9781337669405

Author:FARRELL

Publisher:FARRELL

Chapter2: Elements Of High-quality Programs

Section: Chapter Questions

Problem 2RQ

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(Data processing) A bank’s customer records are to be stored in a file and read into a set of arrays so that a customer’s record can be accessed randomly by account number. Create the file by entering five customer records, with each record consisting of an integer account number (starting with account number 1000), a first name (maximum of 10 characters), a last name (maximum of 15 characters), and a double-precision number for the account balance. After the file is created, write a C++ program that requests a user-input account number and displays the corresponding name and account balance from the file.
(Statistical) In many statistical analysis programs, data values considerably outside the range of the majority of values are simply dropped from consideration. Using this information, write a C++ program that accepts up to 10 floating-point values from a user and determines and displays the average and standard deviation of the input values. All values more than four standard deviations away from the computed average are to be displayed and dropped from any further calculation, and a new average and standard deviation should be computed and displayed.
(Data processing) Your professor has asked you to write a C++ program that determines grades at the end of the semester. For each student, identified by an integer number between 1 and 60, four exam grades must be kept, and two final grade averages must be computed. The first grade average is simply the average of all four grades. The second grade average is computed by weighting the four grades as follows: The first grade gets a weight of 0.2, the second grade gets a weight of 0.3, the third grade gets a weight of 0.3, and the fourth grade gets a weight of 0.2. That is, the final grade is computed as follows: 0.2grade1+0.3grade2+0.3grade3+0.2grade4 Using this information, construct a 60-by-7 two-dimensional array, in which the first column is used for the student number, the next four columns for the grades, and the last two columns for the computed final grades. The program’s output should be a display of the data in the completed array. For testing purposes, the professor has provided the following data:
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