GOEDUHUB Online Courses || Last Batch Student's Projects || COVID-19 Projects(AI-ML) || Universities  ||  Placement Preparation  
+91-7976731765 Free Online Tutorials ||  MACHINE LEARNING || Python || DBMS || OOPs || DSA || Java || Linux/Unix ||  C Programming
0 like 0 dislike
in Tutorial & Interview questions by Goeduhub's Expert (8k points)

 Allocate and zero-initialize an array with user defined size

1 Answer

0 like 0 dislike
by Goeduhub's Expert (8k points)
Best answer
#include <stdio.h>

#include <stdlib.h>

int main (void)


int * pdata;  

size_t n;

printf ("Enter the size of the array: ");  

fflush(stdout);                  /* Make sure the prompt gets printed to buffered stdout. */

if (1 != scanf("%zu", &n))              /* If zu is not supported (Windows?) use lu. */  


fprintf("scanf() did not read a in proper value.\n");    



pdata = calloc(n, sizeof *pdata);  

if (NULL == pdata)  


perror("calloc() failed");                              /* Print error. */    



free(pdata);                    /* Clean up. */



This program tries to scan in an unsigned integer value from standard input, allocate a block of memory for an array of n elements of type int by calling the calloc() function. The memory is initialized to all zeros by the latter.

In case of success the memory is releases by the call to free().
 Placements:   List of companies | Logical Reasoning Questions | Quantitative Aptitude Questions | General English Questions | Technical-MCQ and Interview Questions
 Important Lists: List of NITsList of IITsList of Exams After Graduation | List of Engineering Entrance Examinations (UG/PG)College ReviewsCollege Fest, Events & WorkshopsKnowledge ShareTrainees/Interns After 15-04-2020
Exams & Cutoffs: JEE Main | JEE Advanced | GATE | IES | ISROList of PSUs || Cutoff-GATECutoff_IIT-JEECS-ScopeECE ScopeEE-Scope
 Download Previous Year Papers For:  GATE | IES | RAJASTHAN TECHNICAL UNIVERSITY (RTU-Kota)RPSC Technical Exams | ISRO
About Us | Contact Us   Social::   |  |