> compile NEMU

ysyx_22040000 李心杨
Linux calcite 6.1.69 #1-NixOS SMP PREEMPT_DYNAMIC Wed Dec 20 16:00:29 UTC 2023 x86_64 GNU/Linux
 20:20:22  up 3 days 19:21,  2 users,  load average: 0.46, 0.45, 0.51

nemu/src/monitor/sdb/sdb.c

@@ -136,6 +136,7 @@ static int cmd_info(char *args) {
 
 static int cmd_help_print(char *args, struct CMDTable* cur_cmd_table) {
   int i;
+  printf("Subcommand \n");
   char *arg = strtok(NULL, " ");
   if (arg == NULL) {
     return -1;