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#include <iostream>
using namespace std;
int main()
{
  void swap(int &,int &);
  int i=3,j=5;
  swap(i,j);
  cout<<"i="<<i<<"j="<<j<<endl;
  return 0;
}
 
void swap(int &a,int &b)
{
  int temp;
  temp=a;
  a=b;
  b=temp;
}
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class Demo{
int a;
public Demo(int a){


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