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What will be the output of the following program?

  #include
  class GateTest
  {    
      public:   
      GateTest(int &x, int &y) 
      {        
            x++;    
            y++;    
  }  
};
 int main()
 {     
      int a = 10, b = 20; 
      GateTest objBT(a, b);    
      cout" "
      return 0; 
  }