foo.cc: In function 'int main()':
foo.cc:10:34: warning: 'p' is used uninitialized [-Wuninitialized]
   10 |         Array(int n,int *p):n(n),p(p){ }
      |                                  ^~~~
foo.cc:37:14: note: 'p' was declared here
   37 |         int *p;
      |              ^

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