My C # Introductory Road _day3

After class, the following exercises are performed:

1. Declaring public does not declare that the parameter is public, it cannot be accessed in main.

Error

can be accessed after declaring public.

2,passing by value or by reference

Passing by Value:method can change the value, but the method will not change.

The value in the result is not changed

Passing by reference: can be changed. Note: The ref and Out keywords are available, but the following error occurs when you first use out:

After deleting a statement, the execution succeeds

3, pre-and post-instantiation access.

After modification:

Over

My C # Introductory Road _day3