/in/foo.c: In function 'main':
/in/foo.c:25:9: warning: 'a' is used uninitialized [-Wuninitialized]
   25 |         printf("%d%d%d%d%d",a[4],a[3],a[2],a[1],a[0]);
      |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/in/foo.c:5:13: note: 'a' declared here
    5 |         int a[5];
      |             ^