Program Plan: Include library file for various operations. Declare file_name and line variables of string type. Create a data.txt file to store data values. Use while loop to read data from the file named data.txt. int main() function is used to perform all the task. Display the calculated results to the user. Close the file after displaying the content of the file. Program Description: The main purpose of the program is to read and display the data from the data.txt file.

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Chapter 7.5, Problem 8E

a)

Program Plan Intro

Program Plan:

Include library file for various operations.

Declare file_name and line variables of string type.

Create a data.txt file to store data values.

Use while loop to read data from the file named data.txt.

int main() function is used to perform all the task.

Display the calculated results to the user.

Close the file after displaying the content of the file.

Program Description: The main purpose of the program is to read and display the data from the data.txt file.

b)

Program Plan Intro

Program Plan:

Include library file for various operations.

Declare uChoice, num, counter, sum,and loop variables of int type.

Create a data.txtand tempfile.txt file to store data values.

Use while loop to read data from the file named data.txt.

int main() function is used to perform all the task.

Display the calculated results to the user.

Close the file after displaying the content of the file.

Program Description: The main purpose of the program is to modify the program given in part (a) such that the program will be able to:

Delete the first number of the file.

Add a new integer data value at end of the file.

Compute and display the average of all numbers given in the file.

Overwrite theold file data with the new list of numbers.

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