CIS 122: Assignment #4

Do either (a) or (b); do both for extra credit (10 points).

(a) Application 4-2 and 4-3 of Lesson10, Page 161 of the text book. Only one final program is required, the one meet the requirements of both 4-2 and 4-3.

(b) Application 4-5 of Lesson 10, Page 162 of the text book. Besides what's in the text book, the number of total guess trials is also required in the output.

In Professor Fox's Algorithm Basics course, each students takes 5 exams. A student's letter grade is determined by first calculating her weighted average as follows:

avg = (score1 + score2 + score3 + score4 + score5 - min_score)/4

// letter_grade.cpp
// Find weighted average score and letter grade

#include < iostream >
#include < iomanip >
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using namespace std;

float min(float a, float b);
    // return min of a and b

char grade(float score);
    // Given the score, return letter grade A, B, C, D or F

int main()
{
	float score1, score2, score3, score4, score5;

	float min_score;

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	float avg;

	char letter_grade;

	// Input 5 scores

	cout << "Please enter your scores of five exams: " << endl;

	cin >> score1 >> score2 >> score3 >> score4 >> score5;

	// Determine the weighted average by calling function min(a, b)

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	avg = (score1 + score2 + score3 + score4 + score5 - min_score)/4.0;

	//Determine grade

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	// Output average and grade

	cout << fixed << showpoint << setprecision(1);

	cout << "Weighted average is: " << avg;

	cout << " The final grade is " << letter_grade << endl;

	return 0;

}

//function defintions go here... You do not need to implement the functions.

Write a short program providing the square root of

1.0^2.0 + 1.1^2.1 + 1.2^2.2+ 1.3^2.3 + 1.4^2.4 + 1.5^2.5 + 1.6^2.6 + 1.7^2.7 + 1.8^2.8 + 1.9^2.9.

Standards:

Your program will be judged primarily on its correctness. In particular, the program must compile. Programs that do not will receive a severe grade penalty. Over and above this is the requirement of correct behavior: the cubic volume reported must be correct.

Third, there is presentation: prompts should be formatted neatly (exactly matching the example here is good). Both of the two output numbers provided should have two decimal places, which means, they have a precision of two digits after the decimal point.

Finally, your program will be judged on elegance and adherence to the principles of good programming style. Elegance means that there should be nothing there that isn't necessary for the computation: all variables should have a use, as should all assignments to those variables. Style refers to the proper use of indentation, information variable names, documentation with comments, and other matters of readability.

Turn in:

Either

• A printout of your source code file, and
• A printout of a sample test run

  Or,

• Submit your source code file as a plain text email attachment, sent to me at rao@cs.uoregon.edu