44. Swap Two Values

 Write two functions that swap the values of two integers in different ways:

• void swapPtr(int* a, int* b) → swaps values using pointers.
• void swapRef(int& a, int& b) → swaps values using references.
   

The program will call both functions and print the results.
 You only need to implement the two functions.

Example
 Input:

5 10

Output:

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

Input:

-3 7

Output:

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