Add equations numbering

diff --git a/data.py b/data.py
index 83dfea5..a58068b 100644
--- a/data.py
+++ b/data.py
@@ -11,6 +11,8 @@ segments = dict()
 conditions = []
 unknowns = dict()

+eqn = 0
+
 def trace(f):
     def wrapper(x):
         t = x
@@ -368,9 +370,12 @@ class Condition(object):
               COND_EQ: '='}

     def __init__(self,kind,x,y):
+        global eqn
         self.kind = kind
         self.x = x
         self.y = y
+        eqn += 1
+        self.number = eqn

     def __repr__(self):
         return "C:[%s %s %s]" % (self.x, self._kinds[self.kind], self.y)
diff --git a/syntax.py b/syntax.py
index 643657d..d1bd88a 100644
--- a/syntax.py
+++ b/syntax.py
@@ -58,6 +58,6 @@ if __name__ == '__main__':
             s = s.strip()
             ob = yacc.parse(s)
             if isinstance(ob,Condition):
-                print ob.equation()
+                print "(%s)\t%s" % (ob.number, ob.equation())