--- a/pre_testing3/postfix_test7.scala	Mon Nov 08 00:17:50 2021 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,7 +0,0 @@
-import CW8a._
-
-
-assert(syard(split("3 + 4 * ( 2 - 1 )")) == List("3", "4", "2", "1", "-", "*", "+"))
-assert(syard(split("( ( ( 3 ) ) + ( ( 4 + ( 5 ) ) ) )")) == List("3", "4", "5", "+", "+"))
-assert(syard(split("5 + 7 / 2")) == List("5", "7", "2", "/", "+"))
-assert(syard(split("5 * 7 / 2")) == List("5", "7", "*", "2", "/"))