foo.cc: In function 'int main()':
foo.cc:11:9: warning: 'a[1]' is used uninitialized in this function [-Wuninitialized]
  max=min=a[1];
      ~~~^~~~~
foo.cc:19:13: warning: iteration 9 invokes undefined behavior [-Waggressive-loop-optimizations]
   if(max<a[b])
          ~~~^
foo.cc:17:11: note: within this loop
  for(b=1;b<=10;b++)
          ~^~~~

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