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GPA Calculator

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Join Date: Nov 2007
Posts: 1
Reputation: xenoalien is an unknown quantity at this point 
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xenoalien xenoalien is offline Offline
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GPA Calculator

 
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  #1
Nov 30th, 2007
I need some help. I want to be able to put in a letter grade within a textbox of a class and have the program know that A is 4.0 (A=4.0) then calclulate the GPA by adding all the class grades and dividing by seven which is the number of classes which equals the GPA.

This is what it looks like:

A = 4.0
A- =3.7
B+ = 3.3
B = 3.0
B- =2.7
C+=2.3
C=2.0
C-=1.7
NG = 0



My code looks like this so far it just doesn't know how to interpret A as 4.0 and calculate the GPA:

http://img159.imageshack.us/img159/3107/gpacalcgy7.png
C# Syntax (Toggle Plain Text) 
  1.  using System;
  2. using System.Collections.Generic;
  3. using System.ComponentModel;
  4. using System.Data;
  5. using System.Drawing;
  6. using System.Text;
  7. using System.Windows.Forms;
  8.  
  9. namespace gpacalc
  10. {
  11.     public partial class Form1 : Form
  12.     {
  13.         public Form1()
  14.         {
  15.             InitializeComponent();
  16.         }
  17.  
  18.         private void label1_Click(object sender, EventArgs e)
  19.         {
  20.  
  21.         }
  22.  
  23.         private void label4_Click(object sender, EventArgs e)
  24.         {
  25.  
  26.         }
  27.  
  28.         private void textBox8_TextChanged(object sender, EventArgs e)
  29.         {
  30.  
  31.         }
  32.  
  33.  
  34.         private void button1_Click(object sender, EventArgs e)
  35.         {
  36.             int x = 0;
  37.  
  38.  
  39.             try
  40.             {
  41.  
  42.                 double g1 = Convert.ToDouble(textBox1.Text);
  43.                 double g2 = Convert.ToDouble(textBox2.Text);
  44.                 double g3 = Convert.ToDouble(textBox3.Text);
  45.                 double g4 = Convert.ToDouble(textBox4.Text);
  46.                 double g5 = Convert.ToDouble(textBox5.Text);
  47.                 double g6 = Convert.ToDouble(textBox6.Text);
  48.                 double g7 = Convert.ToDouble(textBox7.Text);
  49.                 textBox8.Text = Convert.ToString((g1 + g2 + g3 + g4 + g5 + g6 + g7) / 7.0);
  50.  
  51.  
  52.  
  53.             }
  54.             catch
  55.             {
  56.                 Console.Write(textBox8.Text = "ERROR");
  57.                 Console.Beep(x = 266, x = 300);
  58.             }
  59.  
  60.         }
  61.         private void textBox1_TextChanged(object sender, EventArgs e)
  62.         {
  63.  
  64.         }
  65.  
  66.         private void button2_Click(object sender, EventArgs e)
  67.         {
  68.             Close();
  69.         }
  70.     }
  71. }


If you could help me on this it would be greatly appreciated.
Last edited by cscgal; Nov 30th, 2007 at 1:03 am. Reason: Added code tags
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Join Date: Aug 2007
Posts: 164
Reputation: Ravenous Wolf is an unknown quantity at this point 
Solved Threads: 1
Ravenous Wolf Ravenous Wolf is offline Offline
Junior Poster

Re: GPA Calculator

 
1
  #2
Nov 30th, 2007
1st

dont calculate and display in a text box in one move. first calculate to a variable.
C# Syntax (Toggle Plain Text) 
  1. g8 = (g1 + g2 + g3...... + g7) / 7.0;

2nd

now you can use g8 in a series of selection structures structure

C# Syntax (Toggle Plain Text) 
  1.  
  2. string s1;
  3.  
  4. if ( g8 > 3.7 && g8 <= 4.0 )
  5.     s1 = "A";
  6.  
  7. if ( g8 > 3.3 && g8 <= 3.7 )
  8.     s1 = "B";
and so on until each grade is checked for. now you display the value of g8 in a textbox and the of s1, which is the grade, as well.
Last edited by Ravenous Wolf; Nov 30th, 2007 at 3:07 am.
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