[c-prog] Doubt in C prog

[anu radha]

Hello all,
   
                2 days back i attended an interview where i was asked a 
question.The question is "how to give one address to other address without the 
using any variables".(i.e) suppose one location is 200 and other is 800 how to 
make 800=200(making address 800 as 200) directly....(using only addresses).
   
  i googled it but did'nt find an  appropriate answer...
   
  please help....
   
  thanx in advance..

                                
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