Four bit adder: Difference between revisions

Content added Content deleted

Inline

@@ Line 152: / Line 152: @@
 def fa4(a, b):
     width = 4
-    ci = [0] * width
+    ci = [None] * width
-    co = [0] * width
+    co = [None] * width
-    s  = [0] * width
+    s  = [None] * width
     for i in range(width):
         s[i], co[i] = fa(a[i], b[i], co[i-1] if i else 0)