C program in data structure of polynomial for implementation of malloc and realloc function

 IMPLEMENTATION OF MALLOC AND REALLOC FUNCTION

#include<stdio.h>
#include<conio.h>
void main()
{
  int s,i,newsize,*p;
  clrscr();
  printf("\n Enter size of an array:-");
  scanf("%d",&s);
  p=(int *)malloc(s*sizeof(int));
  printf("\n Enter the number:-\n");
  for(i=0;i<s;i++)
  {
    scanf("%d",&p[i]);
  }
  printf("\n Entered numbers are:- \n");
  for(i=0;i<s;i++)
  {
    printf(" %d",p[i]);
  }
  printf("\nEnter newsize of an array:-");
  scanf("%d",&newsize);
  p=(int *)realloc(p,newsize);
  printf("\n Enter the numbers for newsize:-\n");
  for(i=s;i<newsize;i++)
  {
    scanf("%d",&p[i]);
  }
  printf("\n All elements of an array is:-\n");
  for(i=0;i<newsize;i++)
  {
    printf(" %d",p[i]);
  }
  getch();
 }