C++客房管理系统

答案：思路上要注意两点：
1.客房的增删改查
2.退房的费用计算
第一点类似于数据库操作，第二点要区分中午12点之前退房还是之后退房，如果是超过12点之后退房的，要额外增加费用。
代码如下：
#include<iostream>
#include<string>
#include<fstream>
#include<cstdlib>
#include<time.h>
using namespace std;
class KF{
public:
 string id;
 string state;
 int level;
 string desc;
 struct tm local;
}kfs[100];
time_t t;
struct tm locNow;
int main(){
 int Sel,SelSub;
 int i,cnt=0,cntDay;
 string strIn;
 while(cout<<"\n\n1.客房列表\n2.增加客房\n3.删除客房\n4.修改客房\n5.查询客房\n6.客房操作\n7.退出\n",cin>>Sel){
  switch(Sel){
  case 1:
   cout<<"\n客房列表：(客房号|客房状态|客房等级|客房描述)\n";
   for(i=0;i<cnt;++i)cout<<kfs[i].id<<'|'<<kfs[i].state<<'|'<<kfs[i].level<<'|'<<kfs[i].desc<<endl;
   break;
  case 2:
   cout<<"\n客房号:\n";
   cin>>kfs[cnt].id;
   cout<<"客房等级:\n";
   cin>>kfs[cnt].level;
   cout<<"客房描述:\n";
   cin>>kfs[cnt].desc;
   kfs[cnt].state="空";
   cout<<"增加成功！当前客房数量="<<++cnt<<endl;
   break;
  case 3:
   cout<<"\n客房号:\n";
   cin>>strIn;
   for(i=0;i<cnt;++i)if(kfs[i].id==strIn)break;
   if(i<cnt){
    for(;i<cnt-1;++i)kfs[i]=kfs[i+1];
    --cnt;
    cout<<"删除客房号="<<strIn<<"成功！当前客房数量="<<cnt<<endl;
   }else cout<<"无此客房号！\n";
   break;
  case 4:
   cout<<"\n客房号:\n";
   cin>>strIn;
   for(i=0;i<cnt;++i)if(kfs[i].id==strIn)break;
   if(i<cnt){
    cout<<"请重新输入该客房信息:\n";
    cout<<"客房号:\n";
    cin>>kfs[i].id;
    cout<<"客房等级:\n";
    cin>>kfs[i].level;
    cout<<"客房描述:\n";
    cin>>kfs[i].desc;
    cout<<"修改原客房号="<<strIn<<"成功！当前客房数量="<<cnt<<endl;
   }else cout<<"无此客房号！\n";
   break;
  case 5:
   cout<<"\n客房号:\n";
   cin>>strIn;
   for(i=0;i<cnt;++i)if(kfs[i].id==strIn)break;
   if(i<cnt){
    cout<<"\n查到该客房！：(客房号|客房状态|客房等级|客房描述)\n";
    cout<<kfs[i].id<<'|'<<kfs[i].state<<'|'<<kfs[i].level<<'|'<<kfs[i].desc<<endl;    
   }else cout<<"无此客房号！\n";
   break;
  case 6:
   while(cout<<"1.入住\n2.退房\n3.续住\n4.返回上层\n",cin>>SelSub){
    switch(SelSub){
    case 1:
     cout<<"\n你好，请问要入住哪个客房？\n";
     cin>>strIn;
     for(i=0;i<cnt;++i)if(kfs[i].id==strIn)break;
     if(i<cnt){
      cout<<"\n该客房如下！：(客房号|客房状态|客房等级|客房描述)\n";
      cout<<kfs[i].id<<'|'<<kfs[i].state<<'|'<<kfs[i].level<<'|'<<kfs[i].desc<<endl;
      if(kfs[i].state=="空"){
       cout<<"确定要入住吗？(y/n)\n";      
       cin>>strIn;
       if(strIn=="y"||strIn=="Y"){
        kfs[i].state="入住";
        t=time(NULL); //当前时间
        kfs[i].local=*localtime(&t);//转化成当地时间存入记录
       }
      }else cout<<"\n此客房非空\n";
     }else cout<<"无此客房号！\n";
     break;
    case 2:
     cout<<"\n请输入你住的房间号:\n";
     cin>>strIn;
     for(i=0;i<cnt;++i)if(kfs[i].id==strIn)break;
     if(i<cnt){
      cout<<"\n该客房如下！：(客房号|客房状态|客房等级|客房描述)\n";
      cout<<kfs[i].id<<'|'<<kfs[i].state<<'|'<<kfs[i].level<<'|'<<kfs[i].desc<<endl;
      if(kfs[i].state!="空"){
       cout<<"确定要退房吗？(y/n)\n";      
       cin>>strIn;
       if(strIn=="y"||strIn=="Y"){
        kfs[i].state="空";       
        t=time(NULL); //当前时间
        locNow=*localtime(&t);
        cntDay=locNow.tm_yday-kfs[i].local.tm_yday;
        if(cntDay==0)cntDay=1;//不足1天算1天
        if(locNow.tm_hour<12){
         cout<<"\n早于中午12点！\n";
         cout<<"\n你好，你的住宿费用是"<<(kfs[i].level*80+200)*cntDay<<endl;
        }else{
         cout<<"\n晚于中午12点，额外费用+50%\n";
         cout<<"\n你好，你的住宿费用是"<<(kfs[i].level*80+200)*(cntDay+0.5)<<endl;
        }
       }
      }else cout<<"\n此客房为空\n";
     }else cout<<"无此客房号！\n";
     break;
    case 3:
     cout<<"\n你好，请问要续住哪个客房？\n";
     cin>>strIn;
     for(i=0;i<cnt;++i)if(kfs[i].id==strIn)break;
     if(i<cnt){
      cout<<"\n该客房如下！：(客房号|客房状态|客房等级|客房描述)\n";
      cout<<kfs[i].id<<'|'<<kfs[i].state<<'|'<<kfs[i].level<<'|'<<kfs[i].desc<<endl;
      if(kfs[i].state=="入住"||kfs[i].state=="续住"){
       cout<<"确定要续住吗？(y/n)\n";      
       cin>>strIn;
       if(strIn=="y"||strIn=="Y"){
        kfs[i].state="续住";
       }
      }else cout<<"\n此客房没被入住或续住，不能续住！\n";
     }else cout<<"无此客房号！\n";
     break;
    case 4:
     break;
    default:
     cout<<"\n输入非法\n";
    }
    if(SelSub==4)break;//返回上层
    system("pause");
   }
   break;
  case 7:
   cout<<"\n谢谢使用！\n";
   break;
  default:
   cout<<"\n输入非法\n";   
  }
  if(Sel==7)break;
  system("pause");
 }
 return 0;
}
效果图：

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