for(x=0;x<3&&strcmp(str,\ { printf(\请输入登录密码(abc123):\ gets(str);
if(strcmp(str,\ printf(\密码错误!\\n\\n\ }
if (x==3)
{printf(\抱歉，登路失败!\\n\ printf(\登陆成功!\\n\\n\
printf(\请按任意键的登录系统!\ getch(); }
/**********************************主函数*************************************/ void main() {int a; sign_on(); do {
system(\
printf(\图书管理系统*****************\\n\printf(\printf(\图书信息录入\\n\printf(\图书信息浏览\\n\printf(\图书信息查询\\n\printf(\图书信息删除\\n\printf(\图书信息修改\\n\printf(\图书信息追加\\n\printf(\退出管理系统\\n\
printf(\printf(\设计人:幻想泡沫 \\n\printf(\学号:**********\\n\printf(\请选择:\scanf(\switch(a)
{case 1:input();break; case 2:list();break; case 3:search();break; case 4:del();break; case 5:revise();break;
case 6:append();break; case 0:exit(0);
default:printf(\序号不对\\n\}while(a!=0);
}
/*****************************************************************************/