{}
#include <iostream>
using namespace std;
int main() {
int a = 10, b = 20;
int *p1 = &a;
int *p2 = &b;
int temp;
temp = *p1;
*p1 = *p2;
*p2 = temp;
cout << "After swapping:" << endl;
cout << "a = " << a << endl;
cout << "b = " << b << endl;
return 0;
}