Question

Given the code segment below, complete the assignments as stated in the comments. struct aaa { int m; int nn; } struct bbb{ struct aaa myfield; int sum; } struct bbb myvar; // write one statement to place the integer value 44 into the field sum of structure variable myvar . // write one statement to place the integer value -17 into the field nn of structure variable myvar .

Answer 1

Answer:

1. using namespace std;
2. struct aaa {
3.    int m;
4.    int nn;
5. };
6. struct bbb{
7.    struct aaa myfield;
8.    int sum;  
9. };
10. struct bbb myvar;
11. int main()
12. {
13.    myvar.sum =44;
14.    myvar.myfield.nn = -17;
15.    
16.    cout<<myvar.sum<<"\n";
17.    cout<<myvar.myfield.nn<<"\n";
18.    return 0;
19. }

Explanation:

Given two data structures (Line 2-9), we can set the value of 44 to field of sum structure variable myvar by using a dot syntax

                      myvar.sum = 44

To assign value to field of nn of structure in myvar, we need to access the myfield of myvar and then followed by nn. Hence, the statement shall be

                     myvar.myfield.nn = -17

In short the we can always use the dot syntax the access the value of an inner field of a particular data structure.