Write about Structures within Structures?

Structures within a structure mean nesting of structures. Nesting of structures is permitted in C. For example: The following Structure defined to store information about the salary of employees. struct salary { char name; char dept; int basic; int dearness_allowance; int house_rent_allowance; int city_allowance; } emp; This structure defines name, department, basic pay & 3 kinds of allowances. We can group all the items related to allowance together and declare them under a structure as shown below. struct salary { char name; char dept; struct; { int da; int hra; int city; } allowance; } emp; The salary structure contains a member named allowance. Which itself is a structure with 3 members. The members contained in the inner structure namely da, hra and city can be referred to as : emp.allowance.da; emp.allowance.hra; emp.allowance.city;