Program Problems

Question

I am trying to a GUI application that allows a user to enter a student’s number of words typed.

 

Make sure the user's input is valid, otherwise prompt them to correct their mistake using

a MessageBox. The output is the letter grade earned by the student. The design of the

application's interface is up to you. You must use parallel arrays and range matching

(not simply a series of if/else if statements). Here is what i have so far:

 

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Windows.Forms;

namespace Lab_6

{

public partial class Form1 : Form

{

public Form1()

{

InitializeComponent();

}

private void button1_Click(object sender, EventArgs e)

{

int numOfWords;

int[] gradeRangeLowLimits = { 0, 16, 31, 51, 76 };

char[] grades = { 'F', 'D', 'C', 'B', 'A' };

bool found = false;

double badInput = 0;

numOfWords = int.Parse(textBox1.Text);

int index = gradeRangeLowLimits.Length - 1;

while (index >= 0 && !found)

{

if (numOfWords >= gradeRangeLowLimits[index])

found = true;

else

--index;

}

if (found)

badInput = grades[index];

MessageBox.Show("Invalid. Please enter another value.");

}

}

}