foo.cc: In function 'int main()':
foo.cc:9:8: warning: 'A' is used uninitialized in this function [-Wuninitialized]
    9 |  cout<<A<<endl;
      |        ^
foo.cc:10:8: warning: 'AAA' is used uninitialized in this function [-Wuninitialized]
   10 |  cout<<AAA<<endl;
      |        ^~~
foo.cc:11:8: warning: 'AAAAA' is used uninitialized in this function [-Wuninitialized]
   11 |  cout<<AAAAA<<endl;
      |        ^~~~~
foo.cc:12:8: warning: 'AAAAAAA' is used uninitialized in this function [-Wuninitialized]
   12 |  cout<<AAAAAAA<<endl;
      |        ^~~~~~~

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