/in/foo.c: In function 'main':
/in/foo.c:26:5: warning: 'c' may be used uninitialized [-Wmaybe-uninitialized]
   26 |     printf("%d\n%d",b,c);
      |     ^~~~~~~~~~~~~~~~~~~~
/in/foo.c:17:13: note: 'c' was declared here
   17 |         int c,d;
      |             ^
/in/foo.c:26:5: warning: 'b' may be used uninitialized [-Wmaybe-uninitialized]
   26 |     printf("%d\n%d",b,c);
      |     ^~~~~~~~~~~~~~~~~~~~
/in/foo.c:6:15: note: 'b' was declared here
    6 |         int a,b,max;
      |               ^