Program Of Array Using Realloc In C

#include<stdio.h>

#include<conio.h>
 

#include<malloc.h>
 

main()
 

{
 

int *a,i,n,y;
 

clrscr();
 

printf("How many Blocks U want to Create For Array =");
 

scanf("%d",&n);
 

for(i=0;i<n;i++)
{
 

 a=(int *)malloc(sizeof(int));
 

}
 

for(i=0;i<n;i++)
 

{
 

printf("a[%d]==> ",i);
 

scanf("%d",&a[i]);
 

}
 

printf("\n============Array Is=============\n");
 

for(i=0;i<n;i++)
 

{
 

printf("\n a[%d]==>%d ",i,a[i]);
 

}
 

printf("\n How Many Memory U want to Reallocate =");
 

scanf("%d",&y);


for(i=0;i<y;i++)
{
 

 a=(int *)realloc(a,y);
 

}
 

for(i=n;i<n+y;i++)
 

{
 

printf("a[%d]==> ",i);
 

scanf("%d",&a[i]);
 

}
 

printf("\n======== again Array Is=============\n");
 

for(i=0;i<n+y;i++)
 

{
 

printf("\n a[%d]==>%d ",i,a[i]);
 

}
 

getch();
 

}

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What is Realloc ?

The Realloc() function changes the size of a block of memory that was previously allocated with Malloc() or Calloc().