--- main.c	Sun May  5 06:53:44 1991
+++ /home/andy/tmp/wrk/main.c	Sat Jul  4 21:31:38 1998
@@ -160,7 +160,7 @@
 int x;
 {     
   int z1, z2, z3, z4, z=0;
-  char nn[6];
+  static char nn[6];
 
   z1 = (int) (x)/1000;
   z2 = (int) (x)/100-(10*z1);