What is value of a in the given code

Question

Does Swapping reference, swaps values inside?
https://code.sololearn.com/ccxDZ6fqcpiN/?ref=app

Answer 1

You swap pointers, not values, inside the function, so no change occurs outside. In order to swap values there should be something like
int t = *ptr1; *ptr1 = *ptr2; *ptr2 = t;