Consider the following union declaration: 1 union ele struct long *p; long y; e1

Question

Consider the following union declaration: 1 union ele struct long *p; long y; e1 struct long x; union ele *next; e2 10 This declaration illustrates that structures can be embedded within unions. The following procedure (with some expressions omitted) operates on a linked list having these unions as list elements: void proc (union ele up) up A. What are the offsets (in bytes) of the following fields: e1.p el.y e2.x e2.next B. How many total bytes would the structure require? C. The compiler generates the following assembly code for the body of proc

Explanation / Answer

A. e1.p==> 4 Byte Because p is a pointer which will store a value of long data type

e1.y==> 4 Bytes Because y is of long data type.

e2.x==> 4 Bytes because x is of long data type

e2.next==> 4 Bytes next is a pointer variable which will hold the address hence 4 bytes.

B. Structure requires total of 8 Bytes here in the given program. Because 4 bytes ale allocated to x and next with 4 bytes each. It will take 8 byte for structure to hold.

Related Questions

Navigate

• Browse (All)
• Browse C
• Subjects

---