Suppose that your program contains the type definitions and code given in Self-Test Exercise 1. That code creates a node that contains the string "Sally" and the number 18. What code would you add in...

Suppose that your program contains the type definitions and code given

in Self-Test Exercise 1. That code creates a node that contains the string

"Sally" and the number 18. What code would you add in order to set the

value of the member variable next of this node equal to NULL?