C语言综合题目.求高手解决.

紧急求助
//用结构体输入数据，输入1继续输入，2结束，并按照书名排序输出。
#include"stdio.h"
#include"string.h"
//结构体
struct Book{
    char name[20];
    int price;
    int num;
    int amout;
}book[20];
int count=3;
//输出
void output(struct Book book[],int sum  )
{
    int i;
    for(i=0;i<sum;i++)
    {
        printf("书名是：\t");printf("单价是：\t");printf("数量是：\t");printf("该书的总价是：\t");
        printf("\n");
        printf("%s\t\t",book[i].name);
        
        printf("%d\t\t",book[i].price);
        
        printf("%d\t\t",book[i].num);
        
        printf("%d,%d,%d\t",book[i].amout=book[i].num*book[i].price);
        printf("\n");
    }
    return;
}
//排序
void sort(struct Book book[], int sun)
{
   struct Book zemp;
   int i;
   for(i=0;i<sun;i++)
   {
       if(strcmp(book[i].name,book[i+1].name)<0)
       {
           zemp=book[i];
           book[i]=book[i+1];
           book[i+1]=zemp;
       }
   }
    output(book,count);
   return;

}
void main()
{
    int i,y;//i 变量
     
   for(i=0;i<count;i++)
    {   
      printf("请输入图书的书名：\n");
      scanf("%s",book[i].name);
      printf("请输入图书的价格：\n");
      scanf("%d",&book[i].price);
      printf("请输入图书的数量：\n");
      scanf("%d",&book[i].num);
       do{
      
      printf("是否继续增加一本书的信息：（1/2）");
      scanf("%d",&y);

      
      
          }while(y==1);
   
}
      printf("***********************************************\n");
      printf("排序前\n");
      output(book,count);
      printf("***********************************************\n");
      printf("按书名排序后为：\n");
      //printf("按书名排序为：\n");
      sort(book,count);
      //printf("***********************************************\n");
      //printf("按书名排序后为：\n");
      //output(book,count);



}
有几个问题我控制不住.
1.count 不应该是具体的值。它是当输入2时，结束并统计count的值。输出
2。排序，好像没什么错啊。可是排不出来
3。就是输入1继续，输入2结束，