test: 更新 Demo1

playground/Demo1/Main.snow

@@ -1,11 +1,9 @@
 module: Main
     import:Math
     function: main
-        parameter:
+        return_type: void
-        return_type: int
         body:
-            Math.factorial(6L,1L)
+            Math.add(6,1)
-            return 0
         end body
     end function
 end module

playground/Demo1/Math.snow

@@ -1,9 +1,9 @@
 module: Math
-    function: factorial
+    function: add
         parameter:
-            declare n1: long
+            declare n1: int
-            declare n2: long
+            declare n2: int
-        return_type: long
+        return_type: int
         body:
            return n1 + n2
         end body