C program that passes a pointer to a structure to a function

#include <stdio.h>
#include <conio.h>
#include <alloc.h>
struct student
{
int r_no;
	 char name[20];
	 char course[20];
int fees;
};
void display (struct student *);
int main()
{
	 struct student *ptr;
	 ptr = (struct student *)malloc(sizeof(struct student));
	 printf("\n Enter the data for the student ");
	 printf("\n ROLL NO.: ");
	 scanf("%d", &ptr–>r_no);

printf("\n NAME: ");
	 gets(ptr–>name);
	 printf("\n COURSE: ");
	 gets(ptr–>course);
	 printf("\n FEES: ");
	 scanf("%d", &ptr–>fees);
	 display(ptr);
	 getch();
	 return 0;
}
void display(struct student *ptr)
{
	 printf("\n DETAILS OF STUDENT");
	 printf("\n ROLL NO. = %d", ptr–>r_no);
	 printf("\n NAME = %s", ptr–>name);
	 printf("\n COURSE = %s ", ptr–>course);
	 printf("\n FEES = %d", ptr–>fees);
}