foo.cc: In function 'int main()':
foo.cc:9:29: warning: iteration 9 invokes undefined behavior [-Waggressive-loop-optimizations]
    9 |                 cout<<a[i]<<' ';
      |                             ^~~
foo.cc:8:22: note: within this loop
    8 |         for(int i=1;i<=10;i++)
      |                     ~^~~~