Swap Two Values

#include <iostream>
using namespace std;

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

void swapRef(int& a, int& b) {
   int c = a;
   a = b;
   b = c;
}

int main() {
   int x, y;
   cin >> x >> y;
   int a = x, b = y;
   swapPtr(&a, &b);
   cout << "After swapPtr: a=" << a << " b=" << b << "\n";
   int c = x, d = y;
   swapRef(c, d);
   cout << "After swapRef: a=" << c << " b=" << d;
   return 0;
}