程序代码：

    while(count < MAXBKS && gets(library[count].title) != NULL && library[count].title[0] != '\n')
    {
        printf("Now enter the author.\n");
        gets(library[count].author);
        printf("Now enter the value.\n");
        scanf("%f",&library[count++].value);
        while(getchar() != '\n')
            continue;           //清空输入行
        if(count < MAXBKS)
            printf("Enter the next title.\n");

    }