Chapter 4: Problem 58

Each of the following programs has errors. Find as many as you can. // This program averages 3 test scores. // It uses the variable perfectScore as a flag. include using namespace std;

Short Answer

Expert verified

Question: Identify and correct the errors in the given program, which should average three test scores using a variable "perfectScore" as a flag. Answer: The given code had several errors, including a missing "int main()" function declaration and no instructions related to performing the necessary operations. The corrected code adds the main function, inputs for test scores, calculations for the average, and checks if the average is a perfect score. The corrected code is: ``` #include using namespace std; int main() { double score1, score2, score3, average; int perfectScore = 100; bool isPerfectScore; cout << "Enter three test scores: "; cin >> score1 >> score2 >> score3; average = (score1 + score2 + score3) / 3; cout << "The average of the three test scores is: " << average << endl; if (average == perfectScore) { isPerfectScore = true; cout << "Congratulations! The average is a perfect score!" << endl; } else { isPerfectScore = false; cout << "The average is not a perfect score." << endl; } return 0; } ```

Step by step solution

Analyze the given code

Look for any errors in the code, such as syntax issues, missing or misused keywords, incorrect use of library functions, or logic problems.

Identify specific errors

Make a list of the errors found during the analysis. Some errors that can be observed in the given code are below: 1. Missing "int main()" function declaration. 2. The code does not include any instructions or logic related to averaging test scores, calculating the perfect score or any input/output functionality.

Correct the errors

Fix the errors identified in step 2 and explain the changes: 1. Add the "int main()" function declaration followed by the main function body enclosed in curly brackets { }. This is necessary for the C++ program to properly compile and execute. 2. Add the necessary variables, input/output statements, and logic to achieve the desired average of three test scores and use the perfectScore variable as a flag. The corrected code should look like this: ``` #include using namespace std; int main() { double score1, score2, score3, average; int perfectScore = 100; bool isPerfectScore; cout << "Enter three test scores: "; cin >> score1 >> score2 >> score3; average = (score1 + score2 + score3) / 3; cout << "The average of the three test scores is: " << average << endl; if (average == perfectScore) { isPerfectScore = true; cout << "Congratulations! The average is a perfect score!" << endl; } else { isPerfectScore = false; cout << "The average is not a perfect score." << endl; } return 0; } ``` Now, the program correctly averages three test scores and uses the perfectScore variable as a flag.

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Each of the following programs has errors. Find as many as you can. // This program averages 3 test scores. // It uses the variable perfectScore as a flag. include using namespace std;

Short Answer

Step by step solution

Analyze the given code

Identify specific errors

Correct the errors

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