Program Plan: Include necessary header files: iostream , fstream , string , and iomanip . Define the main() function. Declare the necessary variables: An ifstream object to read the input file. A string variable to hold the correct test answers. A string variable to hold each line of student data. A string variable to hold the student ID. A string variable to hold the student's answers to the test. An integer variable to hold the student's score. An integer variable to hold the number of questions the student didn't answer. An integer variable to hold the total number of questions. A double variable to hold the percentage score. A char variable to hold the student's grade. Open the input file using the ifstream object. Read the first line of the file, which contains the correct test answers, and store them in the testAnswers variable. Use a loop to read each subsequent line of the file: Extract the student ID and answers from the line using the substr() method. Initialize the score and notAnswered variables to 0. Loop through each answer and compare it to the corresponding correct answer: If the answer is correct, increase the score by 2. If the answer is incorrect, decrease the score by 1. If the question wasn't answered, increment the notAnswered variable. Calculate the percentage score and determine the student's grade based on the percentage score. Output the student's ID, their answers, their score, their percentage score, and their grade to the console. Close the input file. End the main() function and the program. Program Description: To read student answers from a text file compare them to the correct answers and calculate the students' scores and grades.

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Chapter 8, Problem 6PE

Program Plan Intro

Program Plan:

Include necessary header files: iostream, fstream, string, and iomanip.

Define the main() function.

Declare the necessary variables:

An ifstream object to read the input file.

A string variable to hold the correct test answers.

A string variable to hold each line of student data.

A string variable to hold the student ID.

A string variable to hold the student's answers to the test.

An integer variable to hold the student's score.

An integer variable to hold the number of questions the student didn't answer.

An integer variable to hold the total number of questions.

A double variable to hold the percentage score.

A char variable to hold the student's grade.

Open the input file using the ifstream object.

Read the first line of the file, which contains the correct test answers, and store them in the testAnswers variable.

Use a loop to read each subsequent line of the file:

Extract the student ID and answers from the line using the substr() method.

Initialize the score and notAnswered variables to 0.

Loop through each answer and compare it to the corresponding correct answer:

If the answer is correct, increase the score by 2.

If the answer is incorrect, decrease the score by 1.

If the question wasn't answered, increment the notAnswered variable.

Calculate the percentage score and determine the student's grade based on the percentage score.

Output the student's ID, their answers, their score, their percentage score, and their grade to the console.

Close the input file.

End the main() function and the program.

Program Description:

To read student answers from a text file compare them to the correct answers and calculate the students' scores and grades.

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