text: #include <iostream>
  
  using namespace std;
  
  void swap_ints(int *x, int *y) {
      int z = *x;
      *x = *y;
      *y = z;
  }
  
  int main() {
      int a = 5, b = 10;
      
      cout << "Before swap: " << a << " " << b << endl;
      
      swap_ints(&a, &b);
      
      cout << "After swap: " << a << " " << b << endl;
  
      return 0;
  }