Merge pull request #244 from darrencardenas/main

Ported Diamond to Java.

32 Diamond/java/Diamond.java

@@ -0,0 +1,163 @@
+import java.util.Scanner;
+
+/**
+ * Game of Diamond
+ * <p>
+ * Based on the BASIC game of Diamond here
+ * https://github.com/coding-horror/basic-computer-games/blob/main/32%20Diamond/diamond.bas
+ * <p>
+ * Note:  The idea was to create a version of the 1970's BASIC game in Java, without introducing
+ * new features - no additional text, error checking, etc has been added.
+ * 
+ * Converted from BASIC to Java by Darren Cardenas.
+ */
+ 
+public class Diamond {    
+  
+  private static final int LINE_WIDTH = 60;
+  
+  private static final String PREFIX = "CC";
+  
+  private static final char SYMBOL = '!';
+  
+  private final Scanner scan;  // For user input  
+  
+  
+  public Diamond() {
+    
+    scan = new Scanner(System.in);    
+    
+  }  // End of constructor Diamond 
+  
+  
+  public void play() {
+
+    showIntro();
+    startGame();
+
+  }  // End of method play  
+  
+  
+  private void showIntro() {    
+    
+    System.out.println(" ".repeat(32) + "DIAMOND");
+    System.out.println(" ".repeat(14) + "CREATIVE COMPUTING  MORRISTOWN, NEW JERSEY");
+    System.out.println("\n\n");
+    
+  }  // End of method showIntro      
+
+
+  private void startGame() {        
+      
+    int body = 0;
+    int column = 0;
+    int end = 0;
+    int fill = 0;
+    int increment = 2;    
+    int numPerSide = 0;    
+    int prefixIndex = 0;
+    int row = 0;       
+    int start = 1;    
+    int userNum = 0;        
+    
+    String lineContent = "";
+    
+    // Get user input
+    System.out.println("FOR A PRETTY DIAMOND PATTERN,");
+    System.out.print("TYPE IN AN ODD NUMBER BETWEEN 5 AND 21? ");
+    userNum = scan.nextInt();
+    System.out.println("");
+    
+    // Calcuate number of diamonds to be drawn on each side of screen
+    numPerSide = (int) (LINE_WIDTH / userNum);    
+
+    end = userNum;    
+    
+    // Begin loop through each row of diamonds
+    for (row = 1; row <= numPerSide; row++) {
+     
+      // Begin loop through top and bottom halves of each diamond
+      for (body = start; increment < 0 ? body >= end : body <= end; body += increment) {
+
+        lineContent = "";
+        
+        // Add whitespace
+        while (lineContent.length() < ((userNum - body) / 2)) {
+          lineContent += " ";
+        }
+        
+        // Begin loop through each column of diamonds
+        for (column = 1; column <= numPerSide; column++) {
+          
+          prefixIndex = 1;
+          
+          // Begin loop that fills each diamond with characters
+          for (fill = 1; fill <= body; fill++) {
+            
+            // Right side of diamond
+            if (prefixIndex > PREFIX.length()) {
+              
+              lineContent += SYMBOL; 
+              
+            }
+            // Left side of diamond
+            else {
+              
+              lineContent += PREFIX.charAt(prefixIndex - 1);
+              prefixIndex++;
+              
+            }           
+            
+          }  // End loop that fills each diamond with characters
+          
+          // Column finished
+          if (column == numPerSide) {
+            
+            break;
+            
+          }
+          // Column not finishd
+          else {
+            
+            // Add whitespace
+            while (lineContent.length() < (userNum * column + (userNum - body) / 2)) {
+              lineContent += " ";
+            }
+            
+          }          
+          
+        }  // End loop through each column of diamonds
+        
+        System.out.println(lineContent);
+
+      }  // End loop through top and bottom half of each diamond
+
+      if (start != 1) {
+
+        start = 1;
+        end = userNum;
+        increment = 2;        
+      
+      }
+      else {
+          
+        start = userNum - 2;
+        end = 1;
+        increment = -2;        
+        row--;
+
+      }        
+
+    }  // End loop through each row of diamonds
+    
+  }  // End of method startGame
+  
+  
+  public static void main(String[] args) {
+    
+    Diamond diamond = new Diamond();
+    diamond.play();
+    
+  }  // End of method main
+
+}  // End of class Diamond