程序代码：

#include<stdio.h>

struct BookLib                   //定义结构体
{
    char bookname[10];          //书名
    int bookprice;               //书的单价
    int num;                     //书的数量
    int sum;                     //单种书的总价格
};

void list(struct BookLib bookinfo) //函数声明

int main()
{
    int i;
    struct BookLib book[10];   //10本书
    for(i=0;i<=9;i++)          //依次输入书的信息
    {
        printf("请输入第%d本书的名字:\n",i+1);
        scanf("%s",book[i].bookname);
        printf("价格:\n");
        scanf("%d",&book[i].bookprice);
        printf("数量:\n");
        scanf("%d",&book[i].num);
        book[i].sum=book[i].bookprice*book[i].num;
    }
    printf("购书清单:\n");  //输出10本书的信息
    for(i=0;i<=9;i++)
        list(book[i]);
    return 0;
}

/*********定义函数*********/

void list(struct BookLib bookinfo)
{
    printf("%s\t\t%d\t%d\%d\n",  //为了便于阅读，我这里拆成几行写
        bookinfo.bookname,
        bookinfo.bookprice,
        bookinfo.num,
        bookinfo.sum);
}