Raju Verma, 40

Code Understanding

struct Name { char fname[40]; char lname[40];};
Structure with two char array for first name (fname) and last name (lname)of a Name.

struct Person { Name name; int age; };
A structure named Person with nested structure Name with the instance name as name and an additional variable age.

Person p1={{“Raju”,”Verma”},40};
Here is how this kind of nested structure is initialised. Notice the use of additional curly braces for the nested portion.  Remember that partial initialisation rules as specified in #2799 do apply on each structure.

cout<<p1.name.fname<<” “<<p1.name.lname <<“, “<<p1.age<<endl;
Here the nested structure is printed by accessing using the dot(.) operator one or more times as per nesting depth.

Notes

• For partial initialisation of nested structures the omission of trailing values are allowed on each structure basis. For e.g.
  {{“Raju”,”Verma”}}; would be allowed, {40}; will not be allowed.
  {{“Raju”}}; would be allowed, {{“Verma”}}; will not be allowed.
  {{“Raju”},40}; will also be allowed

Common Errors

• Students are advised to count left curly braces and right curly braces to make a correct initialisation. They should be equal.

Suggested Filename(s): stru-nest-init.cpp,stru-ni.cpp