Shakil's Project

#include<stdio.h>
#include<stdlib.h>
#include<string.h>

int num = 0;

void manage();
void remove_member();
void bookinsert();
void search();
void removebook();
void sign_up();
void bookdisplay();
void sign_in();

struct binfo
{
    char book[100];
    char writer[100];
    struct binfo *next;

}*head=NULL;

void manage()
{
    int n,i,a;

    while(1)
    {
        printf("\nPress : \n1 for sign in\n2 for Sign Up\n3 for remove member\n4 for book search\n5 for book insert\n6 for book remove\n7 for show booklist\n8 for exit\n");
        scanf("%d", &n);

        if(n==1){
            sign_in();
        }

        if(n==2)
        {
            sign_up();
        }
        else if(n==3)
        {
            remove_member();
        }
        else if(n==4)
        {
            search();
        }
        else if(n==5)
        {
            struct binfo *current, *new_node;

            new_node=(struct binfo*)malloc(sizeof(struct binfo));

            printf("Enter book name: ");
            scanf(" %[^\n]", new_node->book);
            printf("Enter writer name: ");
            scanf(" %[^\n]", new_node->writer);

            new_node->next=NULL;

            if (head==NULL)
            {
                num++;
                head=new_node;
                current  = new_node;
            }
            else
            {
                num++;
                current->next = new_node;
                current = new_node;
            }
        }
        else if(n==6)
        {
            removebook();
        }
        else if(n==7)
        {
            bookdisplay();
        }
        else if(n==8)
        {
            break;
        }
    }
}


void search()
{
    struct binfo *current;
    char n[100];
    int count = 0;

    while(1)
    {
        current = head;
        if(num>=1){
            printf("\nBook List : \n");
            while (current!=NULL)
            {
                count++;
                printf("%d. Book   : %s\n   Writer : %s\n\n",count, current->book, current->writer);
                current=current->next;
            }
        }
        else{
            printf("Booklist is empty\n");
            break;
        }
        printf("Enter book name : ");
        scanf(" %[^\n]", n);

        current = head;

        while(current != NULL)
        {
            if(strcmp(current->book, n) == 0)
            {
                printf("Book : %s\nWriter : %s\n", current->book, current->writer);
                break;
            }
            current = current->next;
        }
        break;
    }
}


void removebook()
{
    struct binfo *current,*temp1,*temp2;
    int i,n,count = 0;

    while(1){
    if(num>=1){
        current = head;
        printf("\nBook List : \n");
        while (current!=NULL)
        {
            count++;
            printf("%d. Book : %s\n Writer : %s\n\n",count, current->book, current->writer);
        current=current->next;
        }
    }
    else{
        printf("Booklist is empty\n");
        break;
    }
    printf("Select a book : ");
    scanf("%d", &n);

    current = head;

    for(i=1;i<n;i++){
        current = current->next;
    }

    if(current == head)
    {
        num--;
        head = current->next;
        printf("Book removed successfully\n");
        break;
    }
    else if(current->next == NULL)
    {
        num--;
        current = head;
        for(i=1; i<=n-2; i++)
        {
            current = current->next;
        }
        current->next = NULL;
        printf("Book removed successfully\n");
        break;
    }
    else
    {
        num--;
        temp1 = current->next;
        current = head;

        for(i=1; i<=n-2; i++)
        {
            current = current->next;
        }

        current->next = temp1;
        printf("Book removed successfully\n");
        break;
    }
    }

}

void bookdisplay()
{
    struct binfo *current;
    int count = 0;
    current=head;

    if(num>=1){
        printf("\nBook List : \n");
        while (current!=NULL)
        {
            count++;
            printf("%d. Book   : %s\n   Writer : %s\n\n",count, current->book, current->writer);
        current=current->next;
        }
    }
    else{
        printf("Booklist is empty\n");
    }
}

void sign_up()
{
    FILE *fp, *f;
    char name[100], ch[100], ex[] = ".txt", c;
    char gmail[100];
    char pass[20];

    printf("Enter name : ");
    scanf(" %[^\n]", name);
    strcpy(ch, name);
    strcat(name, ex);

    fp = fopen(name, "r");
    if(fp == NULL)
    {
        fclose(fp);
        f = fopen(name, "w");
        fprintf(f, "Name : ");
        fprintf(f, ch);

        printf("Enter gmail : ");
        fprintf(f, "\n");
        getchar();
        fprintf(f, "Gmail : ");
        fprintf(f, gets(gmail));

        printf("Enter password : ");
        fprintf(f, "\n");
        fprintf(f,"Pass : ");
        fprintf(f, gets(pass));

        fclose(f);

    }
    else
    {
        fclose(fp);
        printf("You are already member\n");
    }
}

void remove_member()
{
    FILE *fp, *f;
    char name[100],ex[] = ".txt";
    int x;

    printf("Enter name : ");
    scanf(" %[^\n]", name);
    strcat(name, ex);

    fp = fopen(name, "r");

    if(fp == NULL)
    {
        printf("Oops,, You are not member\n");
    }
    else
    {
        fclose(fp);
        x = remove(name);
        if(x==0) printf("Successfully removed\n");
        else printf("Failed to remove\n");
    }
}

void sign_in()
{
    FILE *fp;
    char ch[100], ex[] = ".txt",pass[50];

    printf("Enter Name : ");
    scanf(" %[^\n]", ch);
    strcat(ch,ex);

    fp = fopen(ch, "r");

    if(fp == NULL){
        fclose(fp);
        printf("You are not member\nPlease sign up first\n");
        return;
    }
    else{
        fclose(fp);
        printf("Enter password : ");
        scanf(" %[^\n]", pass);
        printf("Sign in successful\n");
    }
}

int main()
{
    printf("     --------------------->>>> Welcome to our Library management system <<<<---------------------------\n                                    Team : Casual Programmers\n");
    manage();

    return 0;
}