foo.cc: In function 'int main()':
foo.cc:5:7: warning: left operand of comma operator has no effect [-Wunused-value]
      0<=x,y<=32767;
      ~^~~
foo.cc:5:12: warning: right operand of comma operator has no effect [-Wunused-value]
      0<=x,y<=32767;
           ~^~~~~~~
foo.cc:6:14: warning: 'x' is used uninitialized in this function [-Wuninitialized]
      cout<<x+y<<endl;
              ^
foo.cc:6:14: warning: 'y' is used uninitialized in this function [-Wuninitialized]

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