foo.cc: In function 'int main()':
foo.cc:21:17: warning: 'max2' may be used uninitialized in this function [-Wmaybe-uninitialized]
  cout<<max1<<' '<<max2;
  ~~~~~~~~~~~~~~~^~~~~~
foo.cc:21:14: warning: 'max1' may be used uninitialized in this function [-Wmaybe-uninitialized]
  cout<<max1<<' '<<max2;
              ^~~
foo.cc:6:10: warning: 'ma' may be used uninitialized in this function [-Wmaybe-uninitialized]
  int x,n,ma,i=0,max=0,max1,max2;
          ^~

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