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

What is a calling function in C?
A calling function is a way to execute a block of code that's defined elsewhere in your program. It's like asking a specialized worker to perform a specific task within your main project. It promotes code organization, reusability, and modularity.
Deepika
0 0
6
Which are the best books to learn C?
- Yashwant Kanetkar - E Balagurusamy
Kratika
What is the best way to comment out a section of code that contains comments?
Use group commenting... /*and */
Prasad
Can stdout be forced to print somewhere other than the screen?
No.
Vijay
0 0
5
What is a void main() in the C programming language?
Void main () is the entry point for execution in C program. The void is a keyword that represents function will not return anything but a void value. Main is the name of the function and () represents...
Ambar
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

C Program-The Odd Loop Demo
/* WAP to print square value of the number entered by user using odd loop*/ //Header Files #include<stdio.h>#include<conio.h> //Main Function void main(){ char another='y'; int num,sq; //...

Salim Ahmed Ansari

0 0
1
C-Program Swapping Contents Of Variables Using Function [Call By Reference Method]
//Header Files #include#include // User defined functions swap with 2 pointer variables passed as an argument list void swap(int*i,int*j){ // Local variable temp int temp; // swapping contents using...

Salim Ahmed Ansari

0 0
0
Tress And Its Traversal
Depth First Traversals:(a) Inorder (Left, Root, Right) : 4 2 5 1 3(b) Preorder (Root, Left, Right) : 1 2 4 5 3(c) Postorder (Left, Right, Root) : 4 5 2 3 1 Trees are one of the data structures like...

Sunil Yadav

1 0
0
Pro learners tip for C language
First get the concept of algorithm before heading to write your first program.

Pintu Das

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

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 Hadoop and Big Data

Hadoop is a framework which has been developed for organizing and analysing big chunks of data for a business. Suppose you have a file larger than your system’s storage capacity and you can’t store it. Hadoop helps in storing bigger files than what could be stored on one particular server. You can therefore store very,...

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 >

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 Mumbai
C Language Classes in Chennai
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 © 2010-2024All Rights Reserved