#include<stdio.h>
#include<string.h>
struct book{
char title[100],author[100],subject[100];
int id;
};
void input(struct book s[],int n){
    int i;
for(i=0;i<n;i++){
    printf("Enter title:");
    gets(s[i].title);
    fflush(stdin);
    printf("Enter authors name:");
   gets(s[i].author);
    fflush(stdin);
    printf("Enter id:");
     scanf("%d",&s[i].id);
     fflush(stdin);
     printf("Enter subject:");
     gets(s[i].subject);
     fflush(stdin);
     printf("\n");
}
  }
void view(struct book s[],int n){
    int i;
    printf("Here is the list of books:\n");

    for(i=0;i<n;i++){
      printf("Title:%s\n",s[i].title);
    printf("Author:%s\n",s[i].author);
    printf("Id:%d\n",s[i].id);
    printf("Subject:%s\n",s[i].subject);
    printf("\n");
}
}
void search(struct book s[],int n){
    char find[100];
    int i;
    printf("\nEnter the title of the book to find it:");
    gets(find);
    printf("\n");
    for(i=0;i<n;i++){
            if(strcmp(find,s[i].title)==0){
    printf("Title:%s\n",s[i].title);
    printf("Author:%s\n",s[i].author);
    printf("Id:%d\n",s[i].id);
    printf("Subject:%s\n",s[i].subject);

            }
            else{
                printf("Can't find it");
            }

    }


}
void edit(struct book s[],int n){
    char edit[100],ch;
    int i;
    printf("\nEnter the title of the book to edit it:");
    gets(edit);
    printf("\n");

    for(i=0;i<n;i++){
        if(strcmp(edit,s[i].title)==0){
    printf("Enter title:");
    gets(s[i].title);
    fflush(stdin);
    printf("Enter authors name:");
   gets(s[i].author);
    fflush(stdin);
    printf("Enter id:");
     scanf("%d",&s[i].id);
     fflush(stdin);
     printf("Enter subject:");
     gets(s[i].subject);
     fflush(stdin);
     printf("\n");

        }
    }
printf("Press s/S to see the updated list\n");
ch=getch();
if(ch=='s' || ch=='S'){

    for(i=0;i<n;i++){
      printf("Title:%s\n",s[i].title);
    printf("Author:%s\n",s[i].author);
    printf("Id:%d\n",s[i].id);
    printf("Subject:%s\n",s[i].subject);
    printf("\n");
}

}


}
void delet(struct book s[],int n){
    int del,k,i;
    char ch;
    printf("Enter the Id of the book you want to delete:");
    scanf("%d",&del);
    for(i=0;i<n;i++){
        if(del==s[i].id){
            for(k=i;k<n;k++){
                s[k]=s[k+1];
            }
            n--;
            }
    }
            printf("Press s/S to see the updated list\n");
ch=getch();
if(ch=='s' || ch=='S'){

    for(i=0;i<n;i++){
      printf("Title:%s\n",s[i].title);
    printf("Author:%s\n",s[i].author);
    printf("Id:%d\n",s[i].id);
    printf("Subject:%s\n",s[i].subject);
    printf("\n");
}

}

}

int main(){
int n;
char ch;
printf("How many book you want to add:");
scanf("%d",&n);
fflush(stdin);
struct book s[n];
input(s,n);
view(s,n);
printf("Press 'S\s' for search a book\n");
 printf("Press 'e/E' for edit a book\n");
 printf("Press 'd/D' to delete any book\n");
ch=getch();
if(ch=='s' || ch=='S'){
search(s,n);
}
else if(ch=='e' || ch=='E'){
    edit(s,n);
}
else if(ch=='d' || ch=='D')

    {
    delet(s,n);
    }



return 0;
}