Homework Question

Question

This is the homework question....

 

For all elements in the List letterGrades a. If the element at index i is equal to grade, then increment noOfGrades by 1. This comparison should happen regardless of case, i.e., for p/P/f/F.

 

This is what i have so far....

/*

* Calculate letter grades as P for Pass and F for Fail based on the marks obtained.

* Find the number of instances with the given grades.

*/

namespace Ex1

{

public partial class LetterGrade : Form

{

// Initialize string List

public List<string> letterGrades = new List<string>();

public LetterGrade()

{

InitializeComponent();

}

private void submitButton_Click(object sender, EventArgs e)

{

double marks = double.Parse(marksTextbox.Text); //Declare variable marks and set

// If statements for marks

if (marks>0 && marks<=60)

{

letterGrades.Add("F");

}

else if (marks>60 && marks<=100)

{

letterGrades.Add("P");

}

else

{

MessageBox.Show("Not a valid marks");

}

marksTextbox.Clear();

}

private void calculateButton_Click(object sender, EventArgs e)

{

string grade = letterGradeTextbox.Text; // initialize string grade

int noOfGrades = 0;

for (int i = 0; i < letterGrades.Count; i++)

{

if (grade == "P" || grade == "p") //Problem here, step 7a...could not initialize using [i]..tried using a workaround but it keeps total count..

{

noOfGrades++;

}

else if (grade == "F" || grade == "f")

{

noOfGrades++;

}

}

letterGradeTextbox.Clear();

MessageBox.Show("Number of instances with given letter grade is: " + noOfGrades);

}

}

}

I have no clue how to proceed any one that can point me int he right direction?