/in/foo.cc: In function 'int main()':
/in/foo.cc:7:7: warning: left operand of comma operator has no effect [-Wunused-value]
  if(x1>=1000000,x2>=1000000)
     ~~^~~~~~~~~
/in/foo.cc:8:3: error: break statement not within loop or switch
   break;
   ^~~~~