if(bool(refobject.length()==testobject.length())==true)
   {
    QJsonObject::iterator i,j;
    for (i = refobject.begin(), j= testobject.begin(); 
                  i!=refobject.end()&&j!=testobject.end(); ++i,++j)
    {
    if(i.key()==j.key())
       {     
       if(i.value().isString() && j.value().isString())
       { 
           if(i.value()==j.value())
           {
             //display i and j
           }
           else 
           {
            //display them in a different colour 
           }
           
         }
       else if(i.value().isArray()&& j.value().isArray())
       {
         //iterate and compare
       }
       else if(i.value().isObject() && j.value().isObject())
       {
          //check if there are strings or integers or array and work accordingly 
       }
       else if(i.value().isDouble() && j.value().isDouble())
       {
           if(i.value()==j.value())
           {
             //display i and j
           }
           else 
           {
              //display them in a different colour 
           }
           
       }

    }
}
}

else{//display message that you cannot compare them}
}
}