Added ability to join multiple tables horizontally

Author: tomc128

BooleanExpressionParser/Formatter.cs

@@ -18,7 +18,7 @@ public static string FormatTokens(IEnumerable<Token> tokens)
         return sb.ToString();
     }
 
-    public static string FormatTruthTable(Ast ast, List<bool[]> table, string label="Result")
+    public static string FormatTruthTable(Ast ast, List<bool[]> table, string label = "Result")
     {
         var sb = new StringBuilder();
 
@@ -60,4 +60,19 @@ public static string FormatTruthTable(Ast ast, List<bool[]> table, string label=
     }
 
     static string Repeat(char c, int count) => new string(c, count);
+
+    public static String JoinTruthTables(params string[] tables)
+    {
+        var sb = new StringBuilder();
+
+        var lines = tables.Select(t => t.Split(Environment.NewLine)).ToList();
+
+        for (int i = 0; i < lines.Max(l => l.Length); i++)
+        {
+            sb.AppendJoin(" ", lines.Select(l => i < l.Length ? l[i] : Repeat(' ', l[0].Length)));
+            sb.AppendLine();
+        }
+
+        return sb.ToString();
+    }
 }

BooleanExpressionParser/Program.cs

@@ -14,6 +14,8 @@ static void Main(params string[] args)
             args = QueryExpressions();
         }
 
+        var tables = new List<string>();
+
         foreach (var expression in args)
         {
             var tokeniser = new Tokeniser(expression);
@@ -22,17 +24,22 @@ static void Main(params string[] args)
             var parser = new Parser();
             var prefixTokens = parser.ParseTokens(infixTokens);
 
-            Console.WriteLine(expression);
-            Console.WriteLine("Infix: " + Formatter.FormatTokens(infixTokens));
-            Console.WriteLine("Prefix: " + Formatter.FormatTokens(prefixTokens));
-
             var ast = parser.GrowAst(prefixTokens);
 
             var evaluator = new Evaluator(ast);
             var table = evaluator.EvaluateAll();
 
             var tableString = Formatter.FormatTruthTable(ast, table, label: Formatter.FormatTokens(infixTokens));
-            Console.WriteLine(tableString);
+            tables.Add(tableString);
+        }
+
+        if (tables.Count > 1)
+        {
+            Console.WriteLine(Formatter.JoinTruthTables(tables.ToArray()));
+        }
+        else
+        {
+            Console.WriteLine(tables[0]);
         }
     }