2. Pointer vs Reference Swap

Implement two functions that swap the values of two integers using different parameter-passing mechanisms in C++.

1. void swapPtr(int* a, int* b);

   Swaps the values pointed to by a and b using pointers.

2. void swapRef(int& a, int& b);

   Swaps the values of a and b using references.
    

The main() function will:

• Read two 32-bit signed integers from standard input
• Call swapPtr using one copy of the input values
• Call swapRef using a separate fresh copy of the same input values
• Print the results after each swap

You only need to implement the two swap functions.

Constraints & Notes

• Input integers are 32-bit signed integers
• Pointers passed to swapPtr are guaranteed to be non-null
• Swapping must be done manually (do not use std::swap)
• Swaps must occur in-place
• Do not allocate dynamic memory

Example 1

Input

5 10

Output

After swapPtr: a=10 b=5
After swapRef: a=10 b=5

Example 2

Input

-3 7

Output

After swapPtr: a=7 b=-3
After swapRef: a=7 b=-3