foo.cc: In function 'int main()':
foo.cc:15:13: warning: 't' may be used uninitialized [-Wmaybe-uninitialized]
   15 |     cout<<t/n;
      |             ^
foo.cc:8:19: note: 't' was declared here
    8 |     double a[999],t;
      |                   ^

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