1 // Student: Pat Moss
  2 // Instructor: Dave Hammer
  3 // CIS162AD C# 5832 - Project 02 - Palindrome Tester
  4 
  5 // Write a C# program that asks the user for a phrase.
  6 // Put the phrase into an array of characters and check
  7 // if it is a palindrome.  You will have to remove special
  8 // (nonalphabetic) characters, storing only alphabetic
  9 // characters to a second character array.  You also must
 10 // convert the characters to all uppercase or all lowercase
 11 // as you store them.  The first palindrome might become:
 12 // MADAMIMADAM
 13 
 14 // Using string functions or one or more "for" or "while"
 15 // loops, you now can test the phrase to determine whether
 16 // it is a palindrome.  Make the screen input and output
 17 // attractive and user friendly. Don't forget to break the
 18 // program into functions to do the separate tasks.  Sample
 19 // output should look like this:
 20 // "Madam, I'm Adam" is a palindrome.
 21 
 22 using System;
 23 using System.Drawing;
 24 using System.Collections;
 25 using System.ComponentModel;
 26 using System.Windows.Forms;
 27 using System.Data;
 28 
 29 namespace palindrome
 30 {
 31   public class palindromeform : System.Windows.Forms.Form
 32   {
 33     private System.Windows.Forms.Label lblHeader1;
 34     private System.Windows.Forms.TextBox txtInputString;
 35     private System.Windows.Forms.Label lblPalindromeStatus;
 36     private System.Windows.Forms.Button btnCheckPhrase;
 37     private System.Windows.Forms.Button btnExit;
 38     
 39     private System.ComponentModel.Container components = null;
 40 
 41     public palindromeform()
 42     {
 43       InitializeComponent();
 44     }
 45 
 46     protected override void Dispose( bool disposing )
 47     {
 48       if( disposing )
 49       {
 50         if (components != null)
 51         {
 52           components.Dispose();
 53         }
 54       }
 55       base.Dispose( disposing );
 56     }
 57 
 58     #region Windows Form Designer generated code
 59     /// <summary>
 60     /// Required method for Designer support - do not modify
 61     /// the contents of this method with the code editor.
 62     /// </summary>
 63     private void InitializeComponent()
 64     {
 65       this.lblHeader1 = new System.Windows.Forms.Label();
 66       this.txtInputString = new System.Windows.Forms.TextBox();
 67       this.lblPalindromeStatus = new System.Windows.Forms.Label();
 68       this.btnCheckPhrase = new System.Windows.Forms.Button();
 69       this.btnExit = new System.Windows.Forms.Button();
 70       this.SuspendLayout();
 71       //
 72       // lblHeader1
 73       //
 74       this.lblHeader1.Font = new System.Drawing.Font("Microsoft Sans Serif", 14.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
 75       this.lblHeader1.Location = new System.Drawing.Point(24, 8);
 76       this.lblHeader1.Name = "lblHeader1";
 77       this.lblHeader1.Size = new System.Drawing.Size(216, 32);
 78       this.lblHeader1.TabIndex = 0;
 79       this.lblHeader1.Text = "Enter a phrase to test:";
 80       //
 81       // txtInputString
 82       //
 83       this.txtInputString.Location = new System.Drawing.Point(24, 48);
 84       this.txtInputString.Name = "txtInputString";
 85       this.txtInputString.Size = new System.Drawing.Size(272, 20);
 86       this.txtInputString.TabIndex = 1;
 87       this.txtInputString.Text = "";
 88       //
 89       // lblPalindromeStatus
 90       //
 91       this.lblPalindromeStatus.Font = new System.Drawing.Font("Microsoft Sans Serif", 14.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
 92       this.lblPalindromeStatus.Location = new System.Drawing.Point(24, 80);
 93       this.lblPalindromeStatus.Name = "lblPalindromeStatus";
 94       this.lblPalindromeStatus.Size = new System.Drawing.Size(336, 32);
 95       this.lblPalindromeStatus.TabIndex = 2;
 96       //
 97       // btnCheckPhrase
 98       //
 99       this.btnCheckPhrase.Location = new System.Drawing.Point(56, 128);
100       this.btnCheckPhrase.Name = "btnCheckPhrase";
101       this.btnCheckPhrase.Size = new System.Drawing.Size(104, 24);
102       this.btnCheckPhrase.TabIndex = 3;
103       this.btnCheckPhrase.Text = "Check the Phrase";
104       this.btnCheckPhrase.Click += new System.EventHandler(this.btnCheckPhrase_Click);
105       //
106       // btnExit
107       //
108       this.btnExit.Location = new System.Drawing.Point(208, 128);
109       this.btnExit.Name = "btnExit";
110       this.btnExit.Size = new System.Drawing.Size(56, 24);
111       this.btnExit.TabIndex = 4;
112       this.btnExit.Text = "Exit";
113       this.btnExit.Click += new System.EventHandler(this.btnExit_Click);
114       //
115       // palindromeform
116       //
117       this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
118       this.ClientSize = new System.Drawing.Size(384, 174);
119       this.Controls.Add(this.btnExit);
120       this.Controls.Add(this.btnCheckPhrase);
121       this.Controls.Add(this.lblPalindromeStatus);
122       this.Controls.Add(this.txtInputString);
123       this.Controls.Add(this.lblHeader1);
124       this.Name = "palindromeform";
125       this.Text = "Project 02 - Palindrome Tester - by Pat Moss";
126       this.ResumeLayout(false);
127 
128     }
129     #endregion
130 
131     static void Main()
132     {
133       Application.Run(new palindromeform());
134     }
135 
136     // check the user input string to determine if it is a palindrome
137     private void btnCheckPhrase_Click(object sender, System.EventArgs e)
138     {
139       lblPalindromeStatus.Text = "";
140 
141       string str = "";
142       str = convertString(txtInputString.Text);
143 
144       int left = 0;
145       int right = str.Length - 1;
146 
147       while ((str[left] == str[right]) && (left < right))
148       {
149         left++;
150         right--;
151       }
152 
153       if (left < right)
154       {
155         lblPalindromeStatus.Text = "This phrase is NOT a Palindrome.";
156       }
157       else
158       {
159         lblPalindromeStatus.Text = "This phrase IS a Palindrome.";
160       }
161     }
162 
163     // convert an input string to lower case and
164     // strip out embedded punctuation and spaces
165     private string convertString(string strInp)
166     {
167       string strTemp = "";
168       string strOut = "";
169 
170       strTemp = strInp.Trim().ToLower();
171       
172       for (int i = 0; i<strTemp.Length; i++)
173       {
174         char ch = strTemp[i];
175         if ((ch >= 'a') && (ch <= 'z'))
176           strOut += ch;
177       }
178 
179       return strOut;
180     }
181 
182     // when the user clicks on the "Exit" button - exit the application
183     private void btnExit_Click(object sender, System.EventArgs e)
184     {
185       this.Close();
186     }
187   }
188 }