Hijack thread start: shifting a double

[maha]

hello,
it is a book database i have made 3 functions out of 5 plz help me
these functions are not giving right output .plz plz plz help.
i wil be highly thankful to him/her.plz

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

struct data
{
int book_id;
char authername[89];
char bookname[80];
float price;
};
struct data book[40];
void menu(void);
void add(void);
void sort(void);
  void _display(void);
//void bookdetails(void);
int new;
main()
{
 char ch;
 while(1)
{
 clrscr();
 menu();

  printf("\n enter choice\n");
 ch=getche();

 switch(ch)
{
 case'1':
 add();
 break;
 case'2':
 sort();
 break;
 case'3':
 _display();
 break;
/* case'4':
 bookdetails();
 break;*/
 case'5':
 exit(0);
 break;
//default:
// printf("\n enter a valid choice\n");
}

}
}
void menu(void)
{
 clrscr();
 printf("\n   book database");
 printf("\n 1.add abook");
 printf("\n 2.sort");
 printf("\n 3.price");
 printf("\n 4.bookdetails");
 printf("\n 5.exit");
}

void add(void)
 {
  char x[9];
 clrscr();

  if(new<40)
  {
   printf("\nenter bookid:");
   gets(x);
   book[new].book_id=atoi(x);
   printf("\nenter book price:");
   gets(x);
   book[new].price=atof(x);
   printf("enter book author name");
  gets(book[new].authername);
  printf("enter book name");
  gets(book[new].bookname);
  new++;
  printf("book entere\n");
 getch();
  }
 else
 printf("not enough  memory");

}



void sort(void)
{  int i,o;
    float  temp=0;


// struct data temp;
 for(o=0;o<new-1;o++)
{
 for(i=o+1;i<new;i++)
{
 if(book[o].price>book[i].price)
{
 temp=book[o].price;
 book[o].price=book[i].price;
 book[i].price=temp;
}
}
}
}

  void  _display(void)
{
 int x=0;
 char ch;

 printf("\n\n\n displaying books records");
 do
{
if(x<new)
 {
 printf("\n record # %d\n",x+1);
 printf("\n book name %s",book[x].bookname);
 printf("\n author name: %s",book[x].authername);
 printf("\n book id %d",book[x].book_id);
 printf("\n book price %f ",book[x].price);
 x++;
 printf("press enter to see the next record or exit by pressing esc key");
 ch=getche();
 if(ch==27)
 break;
}
else
 printf("\n \n no more record");
 getch();
 break;

}while(ch!='27');

}