X-Git-Url: http://nitlanguage.org

diff --git a/examples/calculator.nit b/examples/calculator.nit
index ab1bb07..541f4d2 100644
--- a/examples/calculator.nit
+++ b/examples/calculator.nit
@@ -57,6 +57,7 @@ class CalculatorContext
 
 	fun switch_to_decimals
 	do
+		if self.current == null then current = 0.0
 		if after_point != null then return
 
 		after_point = -1
@@ -96,6 +97,7 @@ class CalculatorGui
 
 	var lbl_disp : GtkLabel
 	var but_eq : GtkButton
+	var but_dot : GtkButton
 
 	var context = new CalculatorContext
 
@@ -111,15 +113,17 @@ class CalculatorGui
 		if user_data isa Char then # is an operation
 			var c = user_data
 			if c == '.' then
+				but_dot.sensitive= false
 				context.switch_to_decimals
 				lbl_disp.text = "{context.current.to_i}."
 			else
+				but_dot.sensitive= true
 				context.push_op( c )
 				
 				var s = context.result.to_precision_native(6)
 				var index : nullable Int = null
 				for i in s.length.times do
-				    var chiffre = s[i]
+				    var chiffre = s.chars[i]
 				    if chiffre == '0' and index == null then
 					index = i
 				    else if chiffre != '0' then
@@ -128,14 +132,14 @@ class CalculatorGui
 				end
 				if index != null then
 					s = s.substring(0, index)
-					if s[s.length-1] == ',' then s = s.substring(0, s.length-1)
+					if s.chars[s.length-1] == ',' then s = s.substring(0, s.length-1)
 				end
 				lbl_disp.text = s
 			end
 		else if user_data isa Int then # is a number
 			var n = user_data
 			context.push_digit( n )
-			lbl_disp.text = context.current.to_precision(after_point)
+			lbl_disp.text = context.current.to_precision_native(after_point)
 		end
 	end
 
@@ -178,7 +182,7 @@ class CalculatorGui
 		container.attach( but_eq, 4, 3, 1, 2 )
 
 		# .
-		var but_dot = new GtkButton.with_label( "." )
+		but_dot = new GtkButton.with_label( "." )
 		but_dot.request_size( 64, 64 )
 		but_dot.signal_connect( "clicked", self, '.' )
 		container.attach( but_dot, 1, 4, 1, 1 )
@@ -234,6 +238,32 @@ context.push_op( '=' )
 r = context.result.to_precision( 2 )
 assert r == "14.10" else print r
 
+#test multiple decimals
+context = new CalculatorContext
+context.push_digit( 5 )
+context.push_digit( 0 )
+context.switch_to_decimals
+context.push_digit( 1 )
+context.push_digit( 2 )
+context.push_digit( 3 )
+context.push_op( '+' )
+context.push_digit( 1 )
+context.push_op( '=' )
+r = context.result.to_precision( 3 )
+assert r == "51.123" else print r
+
+#test 'C' button
+context = new CalculatorContext
+context.push_digit( 1 )
+context.push_digit( 0 )
+context.push_op( '+' )
+context.push_digit( 1 )
+context.push_digit( 0 )
+context.push_op( '=' )
+context.push_op( 'C' )
+r = context.result.to_precision( 1 )
+assert r == "0.0" else print r
+
 # graphical application
 
 if "NIT_TESTING".environ != "true" then