[c-prog] unpredictable OUTPUT????

[piyush_4love_4ever]

  using TerboC/C++
   
  # define swap(a,b)temp=a;a=b;b=temp;
   void main()
   {
   int i=5,j=10,temp=0;
   if(i>j) swap(i,j);
   printf("%d %d %d",i,j,temp);   
   } 
    output is 10 0 0.
   [Unpredictable?????? pls help]