How can I learn which element in a union is currently active?

Asked by Last Modified  

1 Answer

Learn C Language

Follow 0
Answer

Please enter your answer

Sanath Kumar Kannam

VLSI Trainer Specialist in Front-End Design & Digital Systems

Actually, that question is really contrary to why I used unions in the first place — the idea was to be able to access one type of data AS IF it was another type. So, for instance, to dissect a floating point value into bytes, or to take a bunch of bytes and interpret as a long or a string, or … So,...
read more
Actually, that question is really contrary to why I used unions in the first place — the idea was to be able to access one type of data AS IF it was another type. So, for instance, to dissect a floating point value into bytes, or to take a bunch of bytes and interpret as a long or a string, or … So, in this use case, there is no *active* element — each element is just another way of interpreting the same chunk of memory. But, if you are using the union as a “catch all” type of structure, to be able to store any kind of value, but you need to know what type is stored there, then by all means add a “type” element to an enclosing struct, as suggested by others. read less
Comments
Dislike Bookmark

Related Questions

How can you check to see whether a symbol is defined?
You can use the #ifdef and #ifndef preprocessor directives to check whether a symbol has been defined (#ifdef) or whether it has not been defined (#ifndef).
Name
Is it important to learn C to learn Python?
yes
Brunda
How do I send a C program via email?
upload your file in gdrive then use that link you can easily email that program
Furqankhan
0 0
5
Is c language easy to learn?
The ease of learning C language depends on an individual's prior programming experience and their familiarity with concepts like memory management. For beginners with no programming background, C might...
Vikash
0 0
6
What are the control statements in C language?
They are broadly classified into three types: decision-making, iteration, and jump statements. Decision-making statements, like if, else if, and switch, determine the flow of execution based on conditions....
Mukund
0 0
5

Now ask question in any of the 1000+ Categories, and get Answers from Tutors and Trainers on UrbanPro.com

Ask a Question

Related Lessons

Internet of Things, Social Media Becoming Part of E-Discovery Landscape
The days when e-discovery consisted of handing over copies of e-mails to address Freedom of Information Act (FOIA) requests, compliance regulations or other legal obligations are over. Now, it's just as...

Rajesh N v

3 0
1
INTRODUCTION TO PROGRAMMING LANGUAGES
Language is a medium for communication. If we want to perform anything with another person, we can know the human language as a human being. Similarly, if we want to perform anything with a computer, we...

Duggineni Srinivasa Rao

0 0
0
4 Things Every Tech Startup Needs to Know About The Coaching Industry
Knowledge on any subject is widely available to those who wish to learn. However, just gathering knowledge from other people doesn’t guarantee results in business. Results come from applying what...

Rajesh N v

3 0
1
Programming Practice Technique
Any Programming Language required an Algorithm. Algorithm - It is the finite set of instructions in which each and every instruction has the meaning, instructions are not ambiguous and all the instructions...

Phanindra Oruganti

1 0
0
Be prepared to get trained--init
Before starting the training,students must be mentally prepared for acceptance of new knowledge. Students must attend training with open minded forgetting the position they are working.This will help...
S

Smartnub Softsolutions

0 0
0

Recommended Articles

Brilliant Academy, a reputed B. Tech Tuition...

Brilliant Academy is one of the reputed institutes for B.Tech tuition classes. This institute is specialised in delivering quality tuition classes for B.E, Engineering - all streams and Engineering diploma courses. Incorporated in 2012, Brillant Academy is a brainchild of Mr Jagadeesh. The main motto of the academy is to...

Read full article >

Lasya Infotech: An educational Training...

Lasya Infotech is a Hyderabad based IT training institute founded in 2016 by O Venkat. Believing in his innovation, passion and persistence and with a diverse blend of experience, he started his brainchild to deliver exemplary professional courses to aspiring candidates by honing their skills. Ever since the institute envisions...

Read full article >

Why Should you Become an IT Consultant

Information technology consultancy or Information technology consulting is a specialized field in which one can set their focus on providing advisory services to business firms on finding ways to use innovations in information technology to further their business and meet the objectives of the business. Not only does...

Read full article >

8 Hottest IT Careers of 2014!

Whether it was the Internet Era of 90s or the Big Data Era of today, Information Technology (IT) has given birth to several lucrative career options for many. Though there will not be a “significant" increase in demand for IT professionals in 2014 as compared to 2013, a “steady” demand for IT professionals is rest assured...

Read full article >

Find C Language Classes near you
C Language Classes in Bangalore
C Language Classes in Hyderabad
C Language Classes in Delhi
C Language Classes in Pune
C Language Classes in Chennai
C Language Classes in Mumbai
C Language Classes in Kolkata
C Language Classes in Noida
C Language Classes in Gurgaon
C Language Classes in Ghaziabad

Looking for C Language Classes?

Learn from the Best Tutors on UrbanPro

Are you a Tutor or Training Institute?

Join UrbanPro Today to find students near you