Question :

(a) (i) What is a structure member in C? What is the relationship between a structure member and the structure?
(ii) How can structure variables be declared in C? How do structure variable declarations differ from structure type declarations?
(iii) Can a structure variable be defined as a member of another structure? Can an array be included as a member of a structure? Can an array have structures as elements?

(b) Describe a structure that contains the following three members:

(i) an integer quantity called won
(ii) an integer quantity called lost
(iii) a floating-point quantity called percentage

Include the user-defined data type record within the definition.

(c) (i) What is a union? How does it differ from a structure?
(ii) How is a union member accessed?
(iii) How can a union member be processed?

(d) Define a union of type ans which contains the following three members:
(i) an integer quantity called ians
(ii) a floating-point quantity called fans
(iii) a double-precision quantity called dans

Now define a structure which contains the following four members:
(i) a union of type ans called answer
(ii) a single character called flag
(iii) two integer quantities called a and b

Finally declare two structure variables called x and y whose composition is as described above.