From 860f64c59f58cb928cc3ddb456fbedc2eaa864da Mon Sep 17 00:00:00 2001
From: AntonisAk <antonis.akylas@gmail.com>
Date: Fri, 28 Mar 2025 18:20:23 +0200
Subject: [PATCH 1/3] IntegerXor dana program

---
 dana/programs/IntXor.dana   | 64 +++++++++++++++++++++++++++++++++++++
 dana/programs/IntXor.input  |  1 +
 dana/programs/IntXor.output |  1 +
 3 files changed, 66 insertions(+)
 create mode 100644 dana/programs/IntXor.dana
 create mode 100644 dana/programs/IntXor.input
 create mode 100644 dana/programs/IntXor.output

diff --git a/dana/programs/IntXor.dana b/dana/programs/IntXor.dana
new file mode 100644
index 0000000..9255b12
--- /dev/null
+++ b/dana/programs/IntXor.dana
@@ -0,0 +1,64 @@
+# A (not so efficient) program that returns the XOR of 2 ints 
+
+def main:
+	
+	#A binary number is represented with an array
+	#where every bit is stored as an int
+	
+	# Function Definitions
+	def DecToBin: n as int, N as int[15]
+		var max i is int
+		max	:= 16384
+		i	:= 14
+
+		loop:
+			N[i] := n / max
+			n := n % max					
+			max := max / 2
+			i = i - 1
+			if i < 0:	break
+	
+	def BinToDec is int: N as int[15]
+		var max i n is int
+		max := 16384
+		i   := 14
+		n	:= 0
+		
+		loop:
+			n := n + N[i] *  max					
+			max := max / 2
+			i = i - 1
+			if i < 0:	break
+		return n
+
+	def XOR: A B X is int[15]
+		var i is int
+		i := 14
+	
+		loop:
+			X[i] := (A[i] + B[i]) % 2	
+			i = i - 1
+			if i < 0:	break
+
+
+	#Main program
+	var a b x is int
+	var A B X is int[15]
+
+	#read input
+	writeString: "Input 2 non negative integers"
+	a := readInteger() 
+	b := readInteger()
+
+	#convert to bianry 
+	DecToBin: a, A
+	DecToBin: b, B
+
+	#Calculate XOR
+	XOR: A, B, X
+	
+	#Convert result to int
+	x := BinToDec(X)
+	
+	#Print result
+	writeInteger: x
diff --git a/dana/programs/IntXor.input b/dana/programs/IntXor.input
new file mode 100644
index 0000000..5d60d4f
--- /dev/null
+++ b/dana/programs/IntXor.input
@@ -0,0 +1 @@
+10472 31738
diff --git a/dana/programs/IntXor.output b/dana/programs/IntXor.output
new file mode 100644
index 0000000..ebe1d19
--- /dev/null
+++ b/dana/programs/IntXor.output
@@ -0,0 +1 @@
+21266

From 56a17ce27fa5ce1d1c207a4ac41614c1b0aa5d53 Mon Sep 17 00:00:00 2001
From: AntonisAk <antonis.akylas@gmail.com>
Date: Fri, 28 Mar 2025 18:31:58 +0200
Subject: [PATCH 2/3] added scope error program

---
 dana/programs-erroneous/scope_error.dana | 12 ++++++++++++
 1 file changed, 12 insertions(+)
 create mode 100644 dana/programs-erroneous/scope_error.dana

diff --git a/dana/programs-erroneous/scope_error.dana b/dana/programs-erroneous/scope_error.dana
new file mode 100644
index 0000000..7a5c5c2
--- /dev/null
+++ b/dana/programs-erroneous/scope_error.dana
@@ -0,0 +1,12 @@
+# x is declared in the loop but called outside
+# the loop -> out of scope error
+
+def main
+	var i is int
+	i	:= 10
+	loop:
+		var x is byte
+		x := 'A'
+		i := i - 1
+		if i=0	: break
+	x := 42

From 1032583ab44179835b1ca714993559825e6bdeb7 Mon Sep 17 00:00:00 2001
From: Kostis Sagonas <kostis@cs.ntua.gr>
Date: Sat, 29 Mar 2025 08:17:33 +0100
Subject: [PATCH 3/3] Fix a spelling error and prettier comments

---
 dana/programs/IntXor.dana | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/dana/programs/IntXor.dana b/dana/programs/IntXor.dana
index 9255b12..066823d 100644
--- a/dana/programs/IntXor.dana
+++ b/dana/programs/IntXor.dana
@@ -2,10 +2,10 @@
 
 def main:
 	
-	#A binary number is represented with an array
-	#where every bit is stored as an int
+	# A binary number is represented with an array
+	# where every bit is stored as an int
 	
-	# Function Definitions
+	# Function definitions
 	def DecToBin: n as int, N as int[15]
 		var max i is int
 		max	:= 16384
@@ -41,24 +41,24 @@ def main:
 			if i < 0:	break
 
 
-	#Main program
+	# Main program
 	var a b x is int
 	var A B X is int[15]
 
-	#read input
+	# Read input
 	writeString: "Input 2 non negative integers"
 	a := readInteger() 
 	b := readInteger()
 
-	#convert to bianry 
+	# Convert to binary 
 	DecToBin: a, A
 	DecToBin: b, B
 
-	#Calculate XOR
+	# Calculate XOR
 	XOR: A, B, X
 	
-	#Convert result to int
+	# Convert result to int
 	x := BinToDec(X)
 	
-	#Print result
+	# Print result
 	writeInteger: x