/in/foo.c: In function 'main':
/in/foo.c:32:9: warning: 'max1' may be used uninitialized [-Wmaybe-uninitialized]
   32 |         printf("%d",max1);
      |         ^~~~~~~~~~~~~~~~~
/in/foo.c:23:19: note: 'max1' was declared here
   23 |         int max=0,max1;
      |                   ^~~~