foo.c: In function ‘main’:
foo.c:5:15: warning: unused variable ‘tot’ [-Wunused-variable]
    5 |         int x,tot;
      |               ^~~
foo.c: In function ‘judge_suShu’:
foo.c:18:13: warning: unused variable ‘tot’ [-Wunused-variable]
   18 |         int tot=0;
      |             ^~~