/in/foo.cc: In function 'int main()':
/in/foo.cc:6:14: warning: right operand of comma operator has no effect [-Wunused-value]
      cin>>n,x;
              ^
/in/foo.cc:7:10: warning: 'x' is used uninitialized in this function [-Wuninitialized]
      if(x*x*x==n)
         ~^~