A teacher has five students who have taken four tests. The teacher uses the foll

Question

A teacher has five students who have taken four tests. The teacher uses the following grading scale to assign a letter grade to a student, based on the average of his or her four test scores:

A=90-100
B=80-89
C=70-79
D= 60-69
F = 0-59

Write a class that uses a String array or an ArrayList object to hold the five students' names, an array of five characters to hold the five students letter grades, and five arrays of four doubles each to hold each student's set of test scores. The class should have methods that return a specific student's name, average test score, and a letter grade based on the average.

Demonstrate the calss in a program that allows the user to enter each students name and his or her four test scores. It should display each students average test score and letter grade.

Do not accept test scores less than zero or greater than 100.

Explanation / Answer

Below is the Program is built in C#.Net which is having a Class StudenAssessment which will let user to enter student name and its scores for 4 tests and then will display the Name,Average Score and Grade.

class StudentAssessment
{
string[] student_names = new string[5];
char[] student_grades = new char[5];

double[] student_first=new double[4];
double[] student_second=new double[4];
double[] student_third=new double[4];
double[] student_Fourth=new double[4];
double[] student_fifth=new double[4];

//This method will Set the Name of Student
public void SetStudentName(int studentnm, string name)
{
student_names[studentnm-1]=name;
}

//This method will Set the Grade of Student
public void SetGrade(int student_number,double[] score)
{
int sum = 0;
int average;
  
for (int i = 0; i < score.Length; i++)
{
sum += (int)score[i];
}
average = sum / 4;

if (average >= 90 && average <= 100)
{
student_grades[student_number-1] = 'A';
}
else if (average >= 80 && average <= 89)
{
student_grades[student_number - 1] = 'B';
}
else if (average >= 70 && average <= 79)
{
student_grades[student_number - 1] = 'C';
}
else if (average >= 60 && average <= 69)
{
student_grades[student_number - 1] = 'D';
}
else if (average >= 0 && average <= 59)
{
student_grades[student_number - 1] = 'F';
}
}

//This method will Get the Average
public double GetAverage(double[] scores)
{
double sum = 0;
double average;
  
for (int i = 0; i < scores.Length; i++)
{
sum += scores[i];
}
average = sum / 4;
return average;
}

//This will set the Score
public void SetStudentScores(int studentnumber,int testNumber, double score)
{
if (studentnumber == 1)
{
student_first[testNumber - 1] = score;
}
if (studentnumber == 2)
{
student_second[testNumber - 1] = score;
}
if (studentnumber == 3)
{
student_third[testNumber - 1] = score;
}
if (studentnumber == 4)
{
student_Fourth[testNumber - 1] = score;
}
if (studentnumber == 5)
{
student_fifth[testNumber - 1] = score;
}
}

static void Main(string[] args)
{
StudentAssessment assessment = new StudentAssessment();
Console.WriteLine("Please Enter the Name of First Student");
assessment.SetStudentName(1, Console.ReadLine());
double score;

for (int i = 1; i < 5; i++)
{
Console.WriteLine("Please Enter the Scores of "+ i + " test for "+assessment.student_names[0]);
score = double.Parse(Console.ReadLine());
if (score>=0 &&score<=100)
{
assessment.SetStudentScores(1,i, score);
}
else
{
Console.WriteLine("You have entered a wrong Score. It should be between 0 to 100.Please re run the application");
Console.ReadLine();
Environment.Exit(0);

}
  
}
assessment.SetGrade(1, assessment.student_first);
  
Console.WriteLine("Please Enter the Name of Second Student");
assessment.SetStudentName(2, Console.ReadLine());

for (int i = 1; i < 5; i++)
{
Console.WriteLine("Please Enter the Scores of " + i + " test for " + assessment.student_names[1]);

score = double.Parse(Console.ReadLine());
if (score >= 0 && score <= 100)
{
assessment.SetStudentScores(2,i, score);
}
else
{
Console.WriteLine("You have entered a wrong Score. It should be between 0 to 100.Please re run the application");
Console.ReadLine();
Environment.Exit(0);

}
}
assessment.SetGrade(2, assessment.student_second);

Console.WriteLine("Please Enter the Name of Third Student");
assessment.SetStudentName(3, Console.ReadLine());

for (int i = 1; i < 5; i++)
{
Console.WriteLine("Please Enter the Scores of " + i + " test for " + assessment.student_names[2]);

score = double.Parse(Console.ReadLine());
if (score >= 0 && score <= 100)
{
assessment.SetStudentScores(3,i, score);
}
else
{
Console.WriteLine("You have entered a wrong Score. It should be between 0 to 100.Please re run the application");
Console.ReadLine();
Environment.Exit(0);

}
}
assessment.SetGrade(3, assessment.student_third);

Console.WriteLine("Please Enter the Name of Fourth Student");
assessment.SetStudentName(4, Console.ReadLine());

for (int i = 1; i < 5; i++)
{
Console.WriteLine("Please Enter the Scores of " + i + " test for " + assessment.student_names[3]);

score = double.Parse(Console.ReadLine());
if (score >= 0 && score <= 100)
{
assessment.SetStudentScores(4,i, score);
}
else
{
Console.WriteLine("You have entered a wrong Score. It should be between 0 to 100.Please re run the application");
Console.ReadLine();
Environment.Exit(0);

}
}
assessment.SetGrade(4, assessment.student_Fourth);

Console.WriteLine("Please Enter the Name of Fifth Student");
assessment.SetStudentName(5, Console.ReadLine());

for (int i = 1; i < 5; i++)
{
Console.WriteLine("Please Enter the Scores of " + i + " test for " + assessment.student_names[4]);

score = double.Parse(Console.ReadLine());
if (score >= 0 && score <= 100)
{
assessment.SetStudentScores(5,i, score);
}
else
{
Console.WriteLine("You have entered a wrong Score. It should be between 0 to 100.Please re run the application");
Console.ReadLine();
Environment.Exit(0);

}
}
assessment.SetGrade(5, assessment.student_fifth);

Console.WriteLine();
Console.WriteLine();
  

Console.WriteLine("Student Name= " + assessment.student_names[0] + " Average Score= " + assessment.GetAverage(assessment.student_first) + " Grade= " + assessment.student_grades[0]);
Console.WriteLine("Student Name= " + assessment.student_names[1] + " Average Score= " + assessment.GetAverage(assessment.student_second) + " Grade= " + assessment.student_grades[1]);
Console.WriteLine("Student Name= " + assessment.student_names[2] + " Average Score= " + assessment.GetAverage(assessment.student_third) + " Grade= " + assessment.student_grades[2]);
Console.WriteLine("Student Name= " + assessment.student_names[3] + " Average Score= " + assessment.GetAverage(assessment.student_Fourth) + " Grade= " + assessment.student_grades[3]);
Console.WriteLine("Student Name= " + assessment.student_names[4] + " Average Score= " + assessment.GetAverage(assessment.student_fifth) + " Grade= " + assessment.student_grades[4]);

Console.ReadLine();
}
  
}

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