Dynamic allocation of memory using malloc() function

Dynamic  allocation of memory using malloc() function

#include<conio.h>
#include<stdio.h>
#include<stdlib.h>
  void main()
   {
       int *ptr,n,i;
       printf("Enter the number of integer to be entered :-");
       scanf("%d",&n);
       ptr=(int*)malloc(n*sizeof(int));
       if(ptr==NULL)
        {
            printf("Memory not available.");
            exit(0);
        }
      printf("Enter %d numbers:-",n);
      for(i=0;i<n;i++)
      scanf("%d",ptr+i);
      printf("Entered numbers is :-");
      for(i=0;i<n;i++)
      printf("%3d",*(ptr+i));
      free(ptr);
    getch();
   }

Output:-