Project

#include <stdio.h>
#include <stdlib.h>
#include <windows.h>
#include <conio.h>
struct student
{
    int id;
    int cla;
    char group[20];
    char name[20];
    char gender[20];
    struct student *next,*prev;
}*start=NULL,*end=NULL,*current;

void create()
{
    if(start==NULL && end==NULL)
    {
        struct student *new_node;
        new_node=(struct student*)malloc(1*sizeof(struct student));
        printf("\nEnter Name:\n");
        scanf("%s",&new_node->name);
        printf("Enter Class:");
        scanf("%d",&new_node->cla);
        printf("Enter ID:\n");
        scanf("%d",&new_node->id);
        printf("Enter Group:\n");
        scanf("%s",&new_node->group);
        printf("Enter Gender:\n");
        scanf("%s",&new_node->gender);
        new_node->next=NULL;
        new_node->prev=NULL;
        start=new_node;
        end=new_node;
        current=new_node;
        system("cls");
    }
    else
    {
        struct student *new_node;
        new_node=(struct student*)malloc(1*sizeof(struct student));
        printf("\nEnter Name:\n");
        scanf("%s",&new_node->name);
        printf("Enter Class:");
        scanf("%d",&new_node->cla);
        printf("Enter ID:");
        scanf("%d",&new_node->id);
        printf("Enter Group:\n");
        scanf("%s",&new_node->group);
        printf("Enter Gender:\n");
        scanf("%s",&new_node->gender);
        new_node->next=NULL;
        new_node->prev=NULL;
        current->next=new_node;
        new_node->prev=current;
        end=new_node;
        current=new_node;
        system("cls");
    }
}
void dis()
{
    struct student *c;
    c=start;
    while(c!=NULL)
    {
        printf("\n Name : %s ID : %d\n Gender : %s Group : %s\n",c->name,c->id,c->gender,c->group);
        c=c->next;
    }
}
int search(int a)
{
    struct student *c;
    c=start;
    int po=0;
    while(c!=NULL)
    {
        po++;
        if(c->id==a)
        {
            return po;
        }
        c=c->next;
    }
    return -1;
}
struct teacher
{
    int id;
    char name[20];
    char gender[20];
    char group[20];
    long int phnum;
    struct teacher *next,*prev;

}*start1=NULL,*end1=NULL,*current1;
void create1()
{
    struct teacher *new_node;
    if(start1==NULL && end1==NULL)
    {
        new_node=(struct teacher*)malloc(1*sizeof(struct teacher));
        printf("\nEnter the number of teacher id:\n");
        scanf("%d",&new_node->id);
        printf("\nEnter your group:\n");
        scanf("%s",&new_node->group);
        printf("\nEnter the teacher name:\n");
        scanf("%s",&new_node->name);
        printf("\nEnter the teacher gender:\n");
        scanf("%s",&new_node->gender);
        printf("\nEnter the teacher phone number:\n");
        scanf("%ld",&new_node->phnum);
        new_node->next=NULL;
        new_node->prev=NULL;

        start1=new_node;
        end1=new_node;
        current1=new_node;
        system("cls");

    }
    else
    {
        new_node=(struct teacher*)malloc(1*sizeof(struct teacher));
        printf("\nEnter the number of teacher id:\n");
        scanf("%d",&new_node->id);
        printf("\nEnter your group:\n");
        scanf("%s",&new_node->group);
        printf("\nEnter the teacher name:\n");
        scanf("%s",&new_node->name);
        printf("\nEnter the teacher gender:\n");
        scanf("%s",&new_node->gender);
        printf("\nEnter the teacher phone number:\n");
        scanf("%ld",&new_node->phnum);
        new_node->next=NULL;
        new_node->prev=NULL;

        current1->next=new_node;
        new_node->prev=current1;
        current1=new_node;
        end1=new_node;
        system("cls");
    }



}
int search1(int a)
{
    struct teacher *c;
    c=start1;
    int po=0;
    while(c!=NULL)
    {
        po++;
        if(c->id==a)
        {
            return po;
        }
        c=c->next;
    }
    return -1;
}
void dis1()
{
    struct teacher *c;
    c=start1;
    while(c!=NULL)
    {
        printf("\nTeacher ID:%d\n",c->id);
        printf("Your group:%s\n",c->group);
        printf("Teacher Name:%s\n",c->name);
        printf("Teacher Gender:%s\n",c->gender);
        printf("Teacher Phone number:%ld\n",c->phnum);
        c=c->next;
    }
}

int main()
{
    int x;
    while(1)
    {
        printf("1.Enter Student Details.\n2.View All Student Details\n3.Search Student Details.\n");
        printf("4.Enter Teacher Details.\n5.View All Teacher Details\n6.Search Teacher Details.\n");
        scanf("%d",&x);
        switch(x)
        {
        case 1:
        {
            create();
            break;
        }
        case 2:
        {
            dis();
            getch();
            system("cls");
            break;
        }
        case 3:
        {
            printf("Enter Id:\n");
            int n;
            scanf("%d",&n);
            int pos = search(n);
            if(pos==-1)
            {
                printf("\n Not Found\n");
            }
            else
            {
                struct student *b;
                b=start;
                int j;
                for(j=0; j<pos-1; j++)
                {
                    b=b->next;
                }
                printf("\n Name:%s ID:%d\n Gender:%s Group:%s\n",b->name,b->id,b->gender,b->group);
                getch();
            system("cls");
            }
        }
        case 4:
        {
            create1();
            break;
        }
        case 5:
        {
            dis1();
            getch();
            system("cls");
            break;
        }
        case 6:
        {
            printf("Enter Id:\n");
            int k;
            scanf("%d",&k);
            int pos1 = search1(k);
            if(pos1==-1)
            {
                printf("\n Not Found\n");
            }
            else
            {
                struct teacher *c;
                c=start1;
                int j;
                for(j=0; j<pos1-1; j++)
                {
                    c=c->next;
                }
                printf("\nTeacher ID:%d\n",c->id);
                printf("Your group:%s\n",c->group);
                printf("Teacher Name:%s\n",c->name);
                printf("Teacher Gender:%s\n",c->gender);
                printf("Teacher Phone number:%ld\n",c->phnum);
                getch();
                system("cls");

            }
            break;
        }
        }
    }
}