test: 重构示例代码 Demo22

playground/Demo/Demo22/Main.snow

@@ -1,11 +1,11 @@
 module: Main
     import: os,ModuleA
     globals:
-        declare sum: int = 3
+        declare sum: int
     function: main
         returns: void
         body:
-            sum = sum + ModuleA._sum(1, 2)
+            sum = ModuleA.a
             os.print(sum)
         end body
     end function

playground/Demo/Demo22/ModuleA.snow

@@ -1,11 +1,4 @@
 module: ModuleA
-    function: _sum
-        params:
-            declare a: int
-            declare b: int
-        returns: int
-        body:
-            return a + b
-        end body
-    end function
+    globals:
+        declare const a: int =10
 end module