~cpp

#include<iostream>
using namespace std;
void swap(int *a, int *b);

int main()
{
	int a=1, b=18 ;
	
	cout << a << "\t " << b << endl;

	swap(&a, &b);
	cout<<a << "\t" << b<<endl;



	return 0;
}

void swap(int *a,int *b)
{
	int c;
	c=*a;
	*a=*b;
	*b=c;
}