Structure Vs Union


Structure

Union
struct keyword is used to define a structure union keyword is used to define a union
In structure, each member get separate space in memory Total memory space allocated is equal to the member with the largest size
All other members use its own memory space All other members share the same memory space
All the members can be initialized while declaring the variable The only first member can be initialized while declaring the variable
An individual member can be accessed at a time Only one member can be accessed at a time
Syntax:
struct [structure name] {
member definition;
member definition;
...
};		 Syntax:
union [union name] {
member definition;
member definition;
...
};
Example:
struct demo {
int integer;
float x;
}		 Example:
union demo{
int integer;{
float x;{
}