100% pointer & structure

#include<stdio.h>
void callstruct(int *ptrstruct)
{
  printf("\n just entered the function callstruct");
   printf("\n\n roll =%d",*ptrstruct++);
   printf("\n name=%c",*ptrstruct);
}
void main()
{
 struct  student
 {
   int r_no;
   char name; // assuming name is single letter like a or b or Z
 }s;
 printf("\n enter the roll no,  name:");
 scanf("%d %c",&s.r_no,&s.name);
 printf("\n roll no= %d,    name=%c",s.r_no,s.name);
 printf("\n\n %u  %u   %u",&s, &s.r_no,&s.name);
 printf("\n we r about to enter the function callstruct\n");
 callstruct(&s);
 }

ఆన్లైన్ లో చేస్తే తెరమీద 

enter the roll no,  name:2 a
roll no= 2,    name=a

 2006898232  2006898232   2006898236
 we r about to enter the function callstruct

 just entered the function callstruct

 roll =2
 name=a