foo.cc: In function 'int main()':
foo.cc:7:16: error: 'max' cannot be used as a function
    7 |         max=max(a,b);
      |             ~~~^~~~~
foo.cc:8:18: error: 'max' cannot be used as a function
    8 |         cout<<max(max,c);
      |               ~~~^~~~~~~

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