foo.c: In function 'findmax':
foo.c:33:13: warning: unused variable 'i' [-Wunused-variable]
   33 |         int i=0;
      |             ^
foo.c: In function 'min2':
foo.c:23:16: warning: 'i' is used uninitialized [-Wuninitialized]
   23 |         while(a[i]!=0)
      |                ^
foo.c:21:13: note: 'i' was declared here
   21 |         int i;
      |             ^

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