init: init nachos hw01, should pass jenkins os_group_20_hw job but fail on os_group_20_ta job

code/test/add.c

@@ -0,0 +1,20 @@
+/* add.c
+ *	Simple program to test whether the systemcall interface works.
+ *	
+ *	Just do a add syscall that adds two values and returns the result.
+ *
+ */
+
+#include "syscall.h"
+
+int
+main()
+{
+  int result;
+  
+  result = Add(42, 23);
+  PrintInt(result);
+//  printf("result is %d\n", result);
+  Halt();
+  /* not reached */
+}