sizeof a union : sizeof « Operators statements « C++ Tutorial

1.	Language Basics
2.	Data Types
3.	Operators statements
4.	Array
5.	Development
6.	Exceptions
7.	Function
8.	Structure
9.	Class
10.	Operator Overloading
11.	Pointer
12.	File Stream
13.	template
14.	STL Introduction
15.	string
16.	vector
17.	list
18.	bitset
19.	set multiset
20.	valarray
21.	queue stack
22.	deque
23.	map multimap
24.	STL Algorithms Modifying sequence operations
25.	STL Algorithms Non modifying sequence operations
26.	STL Algorithms Binary search
27.	STL Algorithms Sorting
28.	STL Algorithms Merge
29.	STL Algorithms Min Max
30.	STL Algorithms Iterator
31.	STL Algorithms Heap
32.	STL Algorithms Helper

C / ANSI-C

C Tutorial

C++

Visual C++ .NET

C++ Tutorial » Operators statements » sizeof

3.6.2.sizeof a union

#include<iostream.h>



union u_tag{

   int i;

   double d;

}u={88};

struct s_tag{

    int i;

       double d;

}s={66,1.234};



int main()

{

    int size;

       size=sizeof(union u_tag);

    cout<<"sizeof(union u_tag)="<<size<<endl;

    u.i=100;

       cout<<"u.i="<<u.i<<endl;

       u.d=1.2345;

       cout<<"u.d="<<u.d<<endl;

       size=sizeof(u.d);

       cout<<"sizeof(u.d)="<<size<<endl;

       cout<<"s.i="<<s.i<<endl;

       cout<<"s.d="<<s.d<<endl;

       size=sizeof(struct s_tag);

       cout<<"sizeof(struct s_tag)="<<size<<endl;

}

sizeof(union u_tag)=8
u.i=100
u.d=1.2345
sizeof(u.d)=8
s.i=66
s.d=1.234
sizeof(struct s_tag)=16

3.6.sizeof
	3.6.1.	Demonstrate sizeof.
	3.6.2.	sizeof a union
	3.6.3.	sizeof a class
	3.6.4.	Object sizes
	3.6.5.	Using the sizeof operator for base class and derived class
	3.6.6.	Use sizeof operator on an array name: returns the number of bytes in the array

www.java2java.com | Contact Us

All other trademarks are property of their respective owners.