fa               1398 user/usertests.c   char fa[N];
fa               1432 user/usertests.c   memset(fa, 0, sizeof(fa));
fa               1440 user/usertests.c       if(i < 0 || i >= sizeof(fa)){
fa               1444 user/usertests.c       if(fa[i]){
fa               1448 user/usertests.c       fa[i] = 1;