2 files changed, 113 insertions, 0 deletions

diff --git a/hello/hello.gpr b/hello/hello.gpr
new file mode 100644
index 0000000..3f34ae9
--- /dev/null
+++ b/hello/hello.gpr
@@ -0,0 +1,5 @@
+project Hello is
+    for Source_Dirs use ("src");
+    for Object_Dir use "obj";
+    for Main use ("main.adb");
+end Hello;
diff --git a/hello/src/main.adb b/hello/src/main.adb
new file mode 100644
index 0000000..c9cb966
--- /dev/null
+++ b/hello/src/main.adb
@@ -0,0 +1,108 @@
+with Ada.Text_IO;         use Ada.Text_IO;
+with Ada.Integer_Text_IO; use Ada.Integer_Text_IO;
+
+procedure main is
+
+  function Factorial (N : Integer) return Integer is
+    F : Integer := 1;
+  begin
+    for i in 2 .. N loop
+      F := F * i;
+    end loop;
+    return F;
+  end Factorial;
+
+  function Fib (N : Integer) return Integer is
+    F : array (0 .. N) of Integer;
+  begin
+    F (0) := 0;
+    F (1) := 1;
+    for I in F'First + 2 .. F'Last loop
+      F (I) := F (I - 2) + F (I - 1);
+    end loop;
+    return F (N);
+  end Fib;
+
+  function Fib_Rec (N : Integer) return Integer is
+  begin
+    if N = 0 then
+      return 0;
+    elsif N = 1 then
+      return 1;
+    else
+      return Fib_Rec (N - 1) + Fib_Rec (N - 2);
+    end if;
+  end Fib_Rec;
+
+  procedure Greet_5 is
+    counter : Integer := 1;
+  begin
+    Put_Line ("Greet_5");
+    loop
+      Put_Line ("Counter: " & Integer'Image (counter));
+      exit when counter = 5;
+      counter := counter + 1;
+    end loop;
+  end Greet_5;
+
+  procedure Greet_With_While is
+    counter : Integer := 1;
+  begin
+    Put_Line ("Greet_With_While");
+    while counter <= 5 loop
+      Put_Line ("Counter: " & Integer'Image (counter));
+      counter := counter + 1;
+    end loop;
+  end Greet_With_While;
+
+  procedure Swap (A, B : in out Integer) is
+    Tmp : Integer;
+  begin
+    Tmp := A;
+    A   := B;
+    B   := Tmp;
+  end Swap;
+
+  procedure Guessing_Game is
+    Answer : Integer := 47;
+    Guess  : Integer;
+  begin
+    loop
+      Put ("Enter a number: ");
+      Get (Guess);
+      if Guess < Answer then
+        Put_Line ("Too low!");
+      elsif Guess > Answer then
+        Put_Line ("Too high!");
+      else
+        Put_Line ("Correct!");
+        exit;
+      end if;
+    end loop;
+  end Guessing_Game;
+
+  N : Integer;
+  X : Integer := 2;
+  Y : Integer := 3;
+
+begin
+  Put ("Enter an integer value: ");
+  Get (N);
+  if N >= 0 then
+    Put_Line ("Fib(" & Integer'Image (N) & ") = " & Integer'Image (Fib (N)));
+    Put_Line
+     ("Factorial(" & Integer'Image (N) & ") = " &
+      Integer'Image (Factorial (N)));
+  else
+    Put_Line ("Please enter a non-negative integer");
+  end if;
+
+  Greet_5;
+  Greet_With_While;
+
+  Put_Line ("Swapping " & Integer'Image (X) & " and " & Integer'Image (Y));
+  Swap (X, Y);
+  Put_Line ("X = " & Integer'Image (X) & ", Y = " & Integer'Image (Y));
+
+  Guessing_Game;
+end main;