swap_by_pointers.cpp

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#include <iostream>
 
using namespace std;
 
void swap( int * x, int * y)
{
    int temp = *x;
    *x = *y;
    *y = temp;
}
 
 
int main()
{
    int a = 2, b = 3;
 
    cout << a << ' ' << b << endl;
 
    swap(&a, &b);
    cout << a << ' ' << b << endl;
 
 
    return 0;
}