/in/foo.c: In function 'main':
/in/foo.c:6:17: warning: format '%d' expects a matching 'int *' argument [-Wformat=]
    6 |         scanf("%d%d%d%d,&hour,&minute,&second,&num");
      |                ~^
      |                 |
      |                 int *
/in/foo.c:6:19: warning: format '%d' expects a matching 'int *' argument [-Wformat=]
    6 |         scanf("%d%d%d%d,&hour,&minute,&second,&num");
      |                  ~^
      |                   |
      |                   int *
/in/foo.c:6:21: warning: format '%d' expects a matching 'int *' argument [-Wformat=]
    6 |         scanf("%d%d%d%d,&hour,&minute,&second,&num");
      |                    ~^
      |                     |
      |                     int *
/in/foo.c:6:23: warning: format '%d' expects a matching 'int *' argument [-Wformat=]
    6 |         scanf("%d%d%d%d,&hour,&minute,&second,&num");
      |                      ~^
      |                       |
      |                       int *
/in/foo.c:7:10: warning: 'second' is used uninitialized [-Wuninitialized]
    7 |         a=second+num;
      |         ~^~~~~~~~~~~
/in/foo.c:5:21: note: 'second' was declared here
    5 |     int hour,minute,second,num,a;
      |                     ^~~~~~
/in/foo.c:7:10: warning: 'num' is used uninitialized [-Wuninitialized]
    7 |         a=second+num;
      |         ~^~~~~~~~~~~
/in/foo.c:5:28: note: 'num' was declared here
    5 |     int hour,minute,second,num,a;
      |                            ^~~