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<h1>classes.sl</h1>
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<td class="line-num">1</td>
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<td class="code-content"><pre>// Object-Oriented Programming in Solilang</pre></td>
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<td class="code-content"><pre></pre></td>
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<td class="line-num">3</td>
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<td class="code-content"><pre>// Define an interface</pre></td>
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<td class="line-num">4</td>
<td class="line-indicator">✗</td>
<td class="code-content"><pre>interface Drawable {</pre></td>
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<td class="line-num">5</td>
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<td class="code-content"><pre> fn draw() -> String;</pre></td>
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<td class="line-num">6</td>
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<td class="code-content"><pre>}</pre></td>
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<td class="line-num">7</td>
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<td class="code-content"><pre></pre></td>
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<td class="line-num">8</td>
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<td class="code-content"><pre>// Base class</pre></td>
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<td class="line-num">9</td>
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<td class="code-content"><pre>class Shape {</pre></td>
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<td class="line-num">10</td>
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<td class="code-content"><pre> x: Float;</pre></td>
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<td class="line-num">11</td>
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<td class="code-content"><pre> y: Float;</pre></td>
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<td class="line-num">12</td>
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<td class="code-content"><pre></pre></td>
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<td class="line-num">13</td>
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<td class="code-content"><pre> new(x: Float, y: Float) {</pre></td>
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<td class="line-num">14</td>
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<td class="code-content"><pre> this.x = x;</pre></td>
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<td class="line-num">15</td>
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<td class="code-content"><pre> this.y = y;</pre></td>
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<td class="line-num">16</td>
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<td class="code-content"><pre> }</pre></td>
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<td class="line-num">17</td>
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<td class="code-content"><pre></pre></td>
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<td class="line-num">18</td>
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<td class="code-content"><pre> fn getPosition() -> String {</pre></td>
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<td class="line-num">19</td>
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<td class="code-content"><pre> return "(" + str(this.x) + ", " + str(this.y) + ")";</pre></td>
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<td class="line-num">20</td>
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<td class="code-content"><pre> }</pre></td>
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<td class="line-num">21</td>
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<td class="code-content"><pre>}</pre></td>
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<td class="line-num">22</td>
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<td class="code-content"><pre></pre></td>
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<td class="line-num">23</td>
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<td class="code-content"><pre>// Derived class with interface implementation</pre></td>
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<td class="line-num">24</td>
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<td class="code-content"><pre>class Circle extends Shape implements Drawable {</pre></td>
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<td class="line-num">25</td>
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<td class="code-content"><pre> radius: Float;</pre></td>
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<td class="line-num">26</td>
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<td class="code-content"><pre></pre></td>
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<td class="line-num">27</td>
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<td class="code-content"><pre> new(x: Float, y: Float, radius: Float) {</pre></td>
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<td class="line-num">28</td>
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<td class="code-content"><pre> this.x = x;</pre></td>
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<td class="line-num">29</td>
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<td class="code-content"><pre> this.y = y;</pre></td>
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<td class="line-num">30</td>
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<td class="code-content"><pre> this.radius = radius;</pre></td>
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<td class="line-num">31</td>
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<td class="code-content"><pre> }</pre></td>
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<td class="line-num">32</td>
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<td class="code-content"><pre></pre></td>
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<td class="line-num">33</td>
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<td class="code-content"><pre> fn getArea() -> Float {</pre></td>
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<td class="line-num">34</td>
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<td class="code-content"><pre> return 3.14159 * this.radius * this.radius;</pre></td>
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<td class="line-num">35</td>
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<td class="code-content"><pre> }</pre></td>
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<td class="line-num">36</td>
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<td class="code-content"><pre></pre></td>
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<td class="line-num">37</td>
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<td class="code-content"><pre> fn draw() -> String {</pre></td>
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<td class="line-num">38</td>
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<td class="code-content"><pre> return "Circle at " + this.getPosition() + " with radius " + str(this.radius);</pre></td>
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<td class="line-num">39</td>
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<td class="code-content"><pre> }</pre></td>
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<td class="line-num">40</td>
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<td class="code-content"><pre>}</pre></td>
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<td class="line-num">41</td>
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<td class="code-content"><pre></pre></td>
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<td class="line-num">42</td>
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<td class="code-content"><pre>class Rectangle extends Shape implements Drawable {</pre></td>
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<td class="line-num">43</td>
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<td class="code-content"><pre> width: Float;</pre></td>
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<td class="line-num">44</td>
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<td class="code-content"><pre> height: Float;</pre></td>
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<td class="line-num">45</td>
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<td class="code-content"><pre></pre></td>
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<td class="line-num">46</td>
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<td class="code-content"><pre> new(x: Float, y: Float, width: Float, height: Float) {</pre></td>
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<td class="line-num">47</td>
<td class="line-indicator">✗</td>
<td class="code-content"><pre> this.x = x;</pre></td>
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<td class="line-num">48</td>
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<td class="code-content"><pre> this.y = y;</pre></td>
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<td class="line-num">49</td>
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<td class="code-content"><pre> this.width = width;</pre></td>
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<td class="line-num">50</td>
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<td class="code-content"><pre> this.height = height;</pre></td>
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<td class="line-num">51</td>
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<td class="code-content"><pre> }</pre></td>
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<td class="line-num">52</td>
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<td class="code-content"><pre></pre></td>
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<td class="line-num">53</td>
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<td class="code-content"><pre> fn getArea() -> Float {</pre></td>
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<td class="line-num">54</td>
<td class="line-indicator">✗</td>
<td class="code-content"><pre> return this.width * this.height;</pre></td>
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<td class="line-num">55</td>
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<td class="code-content"><pre> }</pre></td>
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<td class="line-num">56</td>
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<td class="code-content"><pre></pre></td>
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<td class="line-num">57</td>
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<td class="code-content"><pre> fn draw() -> String {</pre></td>
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<td class="line-num">58</td>
<td class="line-indicator">✗</td>
<td class="code-content"><pre> return "Rectangle at " + this.getPosition() + " (" + str(this.width) + "x" + str(this.height) + ")";</pre></td>
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<td class="line-num">59</td>
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<td class="code-content"><pre> }</pre></td>
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<td class="line-num">60</td>
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<td class="code-content"><pre>}</pre></td>
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<td class="line-num">61</td>
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<td class="code-content"><pre></pre></td>
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<td class="line-num">62</td>
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<td class="code-content"><pre>// Create instances</pre></td>
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<td class="line-num">63</td>
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<td class="code-content"><pre>let circle = new Circle(10.0, 20.0, 5.0);</pre></td>
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<td class="line-num">64</td>
<td class="line-indicator">✗</td>
<td class="code-content"><pre>let rect = new Rectangle(0.0, 0.0, 10.0, 5.0);</pre></td>
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<td class="line-num">65</td>
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<td class="code-content"><pre></pre></td>
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<td class="line-num">66</td>
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<td class="code-content"><pre>print("Shapes Demo:");</pre></td>
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<td class="line-num">67</td>
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<td class="code-content"><pre>print(circle.draw());</pre></td>
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<td class="line-num">68</td>
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<td class="code-content"><pre>print("Area:", circle.getArea());</pre></td>
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<td class="line-num">69</td>
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<td class="code-content"><pre></pre></td>
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<td class="line-num">70</td>
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<td class="code-content"><pre>print(rect.draw());</pre></td>
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<td class="line-num">71</td>
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<td class="code-content"><pre>print("Area:", rect.getArea());</pre></td>
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