UrbanPro
Login Ask & Answer Success Stories Paid Courses Free Classes Tuition & Classes Fees Write a Review All Categories Help Center
Post your Learning Need Signup as a Tutor
✕

Popular Cities

Bangalore

Hyderabad

Delhi

Mumbai

Chennai

Pune

Kolkata

Gurgaon

Ahmedabad

Jaipur

Noida

✕

Learn C Language from the Best Tutors

  • Affordable fees
  • 1-1 or Group class
  • Flexible Timings
  • Verified Tutors

Book a Free Demo

C Language > Learn C Language > How can we use realloc() in C?
✕

Search in

How can we use realloc() in C?

Asked by Last Modified  

3 Answers

Learn C Language

Follow 0
Answer

Please enter your answer

realloc() is used to resize the memory. Suppose if you have more memory then you can reduce it or if you have less memory then you can increase it.
Comments
Dislike Bookmark

realloc() is used to change the size of memory block without losing the old data. It takes 2 arguments. syntax : ptr=(datatype *)realloc(ptr, newsize) ->ptr is the pointer to the memory block which is previously allocated by malloc, calloc or realloc. It holds the starting address of the memory block....
read more
realloc() is used to change the size of memory block without losing the old data. It takes 2 arguments. syntax : ptr=(datatype *)realloc(ptr, newsize) ->ptr is the pointer to the memory block which is previously allocated by malloc, calloc or realloc. It holds the starting address of the memory block. ->newsize is the new size for the memory block. for ex: ptr = (int *)malloc(2*sizeof(int)); // this allocates memory for 2 integers If the memory is to be increased for 3 more integers without losing the previous integers data, then realloc is used as ptr = (int *)realloc(ptr, 5*sizeof(int));. read less
Comments
Dislike Bookmark

Sr. Software Engineer at Bureau Veritas, former Sr. Software Consultant at Aptech Malviynagar

realloc(-,-) function is used to re-allocate or resize the previously allocated memory.for example,suppose you have allocated memory like- int *p=(int*)malloc(4*sizeof(int));//here 8bytes of memory gets allocated Now you want to change the size of existing memory that you have created.so here we can...
read more
realloc(-,-) function is used to re-allocate or resize the previously allocated memory.for example,suppose you have allocated memory like- int *p=(int*)malloc(4*sizeof(int));//here 8bytes of memory gets allocated Now you want to change the size of existing memory that you have created.so here we can use the realloc(-,-) function to alter the size like- p=realloc(p,10*sizeof(int));//here size will be 20bytes Hope this will answer your question. Good Luck! read less
Comments
Dislike Bookmark

View 1 more Answers

Related Questions

Can we have if inside else-if or else in C programming language?
Yes it is possible to do so. The if... else if..... else statements support one other inside themselves... so...
Kirthi
What is a void main() in the C programming language?
In C programming, void main() is an incorrect signature for the main function. The correct signature is int main(). The main function serves as the entry point for C programs and typically returns an integer...
Ambar
0 0
5
How can I avoid the error messages?
When there is a syntax error in the program the compiler indicates it by giving error messages. By following proper syntax we can avoid error messages. Syntax is like grammar rules of english language.
Yusufali
What is a macro, and how do you use it?
A macro is a fragment of code which has been given a name. Whenever the name is used, it is replaced by the contents of the macro. There are two kinds of macros. They differ mostly in what they look...
Sandeep
Does a civil engineer need to learn the C language?
C language is a common subject in the first year of engineering irrespective of the branch. It may not be helpful for your civil engineering career but you definitely need to pass for B.Tech graduation.
Sandeep
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

Why C is a Language and not a database?
When I interviewed a candidate, I raised this question many times, but I have not got the answer correctly. To under why C is a language and not a database, it is good to understand why our communication...

Vihanga EmbedSoft

0 0
0
C Program-Prime Number
/*WAP to print a number entered by the user is prime or not*/ //Header files #include<stdio.h>#include<conio.h> //Main function void main(){ int num,i; //Function for clearing screen clrscr();...
S

Salim Ahmed Ansari

0 0
0
C Programming basics
C PROGRAMMING BASICS 10 Hours Introduction to ‘ C’ programming –fundamentals – structure of a ‘C’...
O

Om K.

0 0
0
Why Indexing Should Start From Zero In Array ?
Why numbering should start at zero? To denote the subsequence of natural numbers 2, 3, ..., 12 without the pernicious three dots, fourconventions are open to usa) 2 ≤ i < 13b) 1 < i ≤ 12c)...

Sunil Yadav

0 0
0
10 Tips to improve your learning
1. Have a quick revision of topics that you have read in past three days before you start studying a new topic. 2. Make your own notes containing the summary of the topic. 3. Allot proper timing for...

Seemakurthy Hupesh Naga Ketan

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 >

Learn Microsoft Excel

Microsoft Excel is an electronic spreadsheet tool which is commonly used for financial and statistical data processing. It has been developed by Microsoft and forms a major component of the widely used Microsoft Office. From individual users to the top IT companies, Excel is used worldwide. Excel is one of the most important...

Read full article >

Make a Career in Mobile Application Programming

Almost all of us, inside the pocket, bag or on the table have a mobile phone, out of which 90% of us have a smartphone. The technology is advancing rapidly. When it comes to mobile phones, people today want much more than just making phone calls and playing games on the go. People now want instant access to all their business...

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 Ahmedabad
C Language Classes in Noida
C Language Classes in Jaipur

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
X

Looking for C Language Classes?

The best tutors for C Language Classes are on UrbanPro

  • Select the best Tutor
  • Book & Attend a Free Demo
  • Pay and start Learning

Learn C Language with the Best Tutors

The best Tutors for C Language Classes are on UrbanPro

This website uses cookies

We use cookies to improve user experience. Choose what cookies you allow us to use. You can read more about our Cookie Policy in our Privacy Policy

Accept All
Decline All

UrbanPro.com is India's largest network of most trusted tutors and institutes. Over 55 lakh students rely on UrbanPro.com, to fulfill their learning requirements across 1,000+ categories. Using UrbanPro.com, parents, and students can compare multiple Tutors and Institutes and choose the one that best suits their requirements. More than 7.5 lakh verified Tutors and Institutes are helping millions of students every day and growing their tutoring business on UrbanPro.com. Whether you are looking for a tutor to learn mathematics, a German language trainer to brush up your German language skills or an institute to upgrade your IT skills, we have got the best selection of Tutors and Training Institutes for you. Read more

ThinkVidya Learning Pvt Ltd © 2010-2025All Rights Reserved