Adding file problem from final exam.

Author: aubertc

source/code/projects/ReadOrWritePath/ReadOrWritePath/Program.cs

@@ -0,0 +1,61 @@
+using System;
+using System.IO;
+
+class Program
+{
+  static void Main(string[] args)
+  {
+    Console.WriteLine("Enter a path");
+    string path = Console.ReadLine();
+    if (File.Exists(path))
+    {
+      Console.WriteLine(
+        "Now displaying file at " + path + "."
+      );
+      try
+      {
+        StreamReader sr = new StreamReader(path);
+        string cLine = sr.ReadLine();
+        while (cLine != null)
+        {
+          Console.WriteLine(cLine);
+          cLine = sr.ReadLine();
+        }
+        sr.Close();
+        Console.WriteLine("Done displaying file.");
+      }
+      catch
+      {
+        Console.WriteLine(
+          "There was an error opening your file."
+        );
+      }
+    }
+    else
+    {
+      Console.WriteLine(
+        "Now creating a file at "
+          + path
+          + ".\n Enter your text, one line at a time. When done, type \"!DONE!\" (without the quotes), then enter."
+      );
+      try
+      {
+        StreamWriter sw = new StreamWriter(path);
+        string uInput = Console.ReadLine();
+        while (uInput != "!DONE!")
+        {
+          sw.WriteLine(uInput);
+          uInput = Console.ReadLine();
+        }
+        sw.Close();
+        Console.WriteLine("File correctly written.");
+      }
+      catch
+      {
+        Console.WriteLine(
+          "There was an error creating your file."
+        );
+      }
+    }
+  }
+}

source/solutions/io/files.md

@@ -138,3 +138,46 @@ tags:
     !include code/projects/FileCountProgram/FileCountProgram/Program.cs
     ```
     </details>
+
+#.  Write a program that
+
+    #. Asks the user to enter a path,
+    #. Checks if there is a file at this path:
+        #. If there is a file, display its content at the screen.
+        #. If there is no file, ask the user to enter text. When the user enters exactly "!DONE!", on a single line, without the quotes, write the text entered before !DONE! into a file located at the given path.
+
+    Your program should be able to handle graciously possible issues (such as an invalid path).
+
+    Below are two examples of execution, taking place one after the other.
+    
+    
+    ### Example execution #1
+
+    ```text
+    Enter a path  
+    /͟h͟o͟m͟e͟/͟u͟s͟e͟r͟/͟C͟S͟C͟I͟_͟1͟3͟0͟2͟/͟f͟i͟n͟a͟l͟/͟t͟e͟s͟t͟.͟t͟x͟t͟
+    Now creating a file at /home/user/CSCI_1302/final/test.txt.  
+    Enter your text, one line at a time. When done, type "!DONE!" (without the quotes), then enter.  
+    T͟h͟i͟s͟ ͟i͟s͟ ͟a͟ ͟t͟e͟s͟t͟
+    s͟p͟a͟n͟n͟i͟n͟g͟ ͟o͟v͟e͟r͟
+    t͟h͟r͟e͟e͟ ͟l͟i͟n͟e͟s͟.͟  
+    !͟D͟O͟N͟E͟!͟
+    File correctly written.
+    ```
+
+    ### Example execution #2
+
+    ```text
+    Enter a path  
+    /͟h͟o͟m͟e͟/͟u͟s͟e͟r͟/͟C͟S͟C͟I͟_͟1͟3͟0͟2͟/͟f͟i͟n͟a͟l͟/͟t͟e͟s͟t͟.͟t͟x͟t͟
+    Now displaying file at /home/user/CSCI_1302/final/test.txt.  
+    This is a test  
+    spanning over  
+    three lines.  
+    Done displaying file.  
+    ```
+    
+    <details><summary>Solution</summary>```{download="./code/projects/ReadOrWritePath.zip"}
+    !include code/projects/ReadOrWritePath/ReadOrWritePath/Program.cs
+    ```
+    </details>

source/solutions/oop/inheritance.md

@@ -17,7 +17,7 @@ tags:
   - [ ] `inherits`
 
 
-## Problem
+## Problems
 
 #. Consider the diagram representing the "Room", "ClassRoom", "Office" classes and their relations.