C++ for Engineers and Scientists
C++ for Engineers and Scientists
4th Edition
ISBN: 9781133187844
Author: Bronson, Gary J.
Publisher: Course Technology Ptr
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Chapter 7.4, Problem 7E

(Statistics) Write a program that includes two functions named calcavg() and variance(). The calcavg() function should calculate and return the average of values stored in an array named testvals. The array should be declared in main() and include the values 89, 95, 72, 83, 99, 54, 86, 75, 92, 73, 79, 75, 82, and 73. The variance() function should calculate and return the variance of the data. The variance is obtained by subtracting the average from each value in testvals, squaring the values obtained, adding them, and dividing by the number of elements in testvals. The values returned from calcavg() and variance() should be displayed by using cout statements in main().

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Chapter 7 Solutions

C++ for Engineers and Scientists

Ch. 7.2 - (Practice) Write array declarations, including...Ch. 7.2 - (Data processing) Write an array declaration...Ch. 7.2 - (Data processing) Write a program that uses an...Ch. 7.2 - (Electrical eng.) Write a program that stores the...Ch. 7.2 - (Practice) a. Write a declaration to store the...Ch. 7.3 - (Practice) Write specification statements for the...Ch. 7.3 - (Desk check) Determine the output produced by the...Ch. 7.3 - (Practice) a. Write a C++ program that adds the...Ch. 7.3 - (Practice) Write a C++ program that adds...Ch. 7.3 - Prob. 5ECh. 7.3 - (Electrical eng.) a. An engineer has constructed a...Ch. 7.4 - Prob. 1ECh. 7.4 - Prob. 2ECh. 7.4 - Prob. 3ECh. 7.4 - Prob. 4ECh. 7.4 - Prob. 5ECh. 7.4 - (Electrical eng.) Write a program that declares...Ch. 7.4 - (Statistics) Write a program that includes two...Ch. 7.5 - Prob. 1ECh. 7.5 - (Practice) Run Program 7.10 to determine the...Ch. 7.5 - Prob. 3ECh. 7.5 - (List maintenance) a. Write a complete C++ program...Ch. 7.5 - Prob. 5ECh. 7.5 - (List maintenance) The following letters are...Ch. 7.5 - (File creation) Write a C++ program that creates...Ch. 7.5 - Prob. 8ECh. 7.5 - Prob. 9ECh. 7.5 - Prob. 10ECh. 7.5 - Prob. 11ECh. 7.5 - Prob. 12ECh. 7.5 - Prob. 13ECh. 7.5 - Prob. 14ECh. 7.5 - Prob. 15ECh. 7.6 - Prob. 1ECh. 7.6 - Prob. 2ECh. 7.6 - Prob. 3ECh. 7.6 - Prob. 4ECh. 7.6 - Prob. 5ECh. 7.6 - Prob. 6ECh. 7.6 - Prob. 7ECh. 7.6 - Prob. 8ECh. 7.6 - (Practice) Use the max_element and min_element...Ch. 7 - (Statistics) a. Write a C++ program that reads a...Ch. 7 - (Practice) Define an array named peopleTypes that...Ch. 7 - (Numerical) Given a one-dimensional array of...Ch. 7 - (Numerical) Write and test a function that returns...Ch. 7 - (Sorting) Read a set of numerical grades from the...Ch. 7 - (Numerical) a. Define an array with a maximum of...Ch. 7 - (Numerical) Using the srand() and rand() C++...Ch. 7 - (Statistical) In many statistical analysis...Ch. 7 - (Data processing) Your professor has asked you to...Ch. 7 - (Modify) Modify the program written for Exercise 9...Ch. 7 - Prob. 11PPCh. 7 - (Data processing) The answers to a true-false test...Ch. 7 - Prob. 13PPCh. 7 - (Data processing) Construct a three-dimensional...Ch. 7 - (Computation) A magic square is a square of...Ch. 7 - (Computation) Among other applications, Pascal’s...
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