A DSA program using student as an object.

#include<stdio.h>
#include<conio.h>
#include<stdlib.h>
struct student
{
int tot;
int rollno;
char name[10];
int marks;
struct student *next,*pre;
};
void main()
{
 int sub1,sub2,sub3,sub4,sub5;
 int tot;
 struct student *start,*ptr;
 char ch='y';
 start=NULL;
 clrscr();
 while(ch=='y')
 {
    if(start==NULL)
    {
start=ptr=malloc (sizeof (struct student));
start->pre=ptr;
    }
    else
    {
    ptr->next=malloc (sizeof (struct student));
    ptr->next->pre=ptr;
    ptr=ptr->next;
    }
    ptr->next=NULL;
    printf("\n enter any rollno :");
    scanf("%d",& ptr->rollno);
    printf("\n enter name :");
    scanf("%s",& ptr->name);
    printf("\n enter marks of 1st subject :");
    scanf("%d",& sub1);
    printf("\n enter marks of 2nd subject :");
    scanf("%d",& sub2);
    printf("\n enter marks of 3rd subject :");
    scanf("%d",& sub3);
    printf("\n enter marks of 4th subject :");
    scanf("%d",& sub4);
    printf("\n enter marks of 5th subject :");
    scanf("%d",& sub5);
    ptr->tot=sub1+sub2+sub3+sub4+sub5;
    printf("\n Total marks of a student is  : %d",ptr->tot);
    printf("\n \n enter your choice (y/n):");
    fflush(stdin);
    scanf("%c",& ch);
 }
for(ptr=start;ptr!=NULL;ptr=ptr->next)
{
printf("\n\n Rollno. of a student : %d",ptr->rollno);
printf("\n Name of a student : %s",ptr->name);
printf("\n Total marks of a student : %d",ptr->tot);
}
getch();
}

Posted in: 3rd semester,C++,coding