What is the method for invoking a C language structure?

In C language, the following methods can be used to invoke a structure:

1. Accessing structure members directly through the structure variable name:
2. The student structure contains an ID, a name, and an age. A student named John with an ID of 1 and age of 20 has been initialized.
3. Accessing structure members through pointers.
4. There is a structure called Student that contains an id, a name, and an age. An instance of Student named stu is created, and a pointer to the struct called pStu is assigned to point to stu. The id of pStu is set to 1, the name to “John”, and the age to 20.
5. Passing a structure through function parameters.
6. Define a structure named Student with three data members: id, name, and age. Create a function setStudent that takes a pointer to a Student structure as input and assigns values for id, name, and age. Instantiate a Student structure named stu and call the setStudent function passing a reference to stu.

All of the above methods can be used to call a struct, as well as assign values to or access members of the struct.