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  1.  
  2. #include <iostream>
  3. #include <string>
  4. #include <limits>
  5. using namespace std;
  6.  
  7. bool readInt(const string& msg, int& x) {
  8.     while (true) {
  9.         cout << msg;
  10.         if (cin >> x) return true;
  11.         if (cin.eof()) return false;
  12.         cin.clear();
  13.         cin.ignore(numeric_limits<streamsize>::max(), '\n');
  14.         cout << "Phai nhap so nguyen!\n";
  15.     }
  16. }
  17. bool readDouble(const string& msg, double& x) {
  18.     while (true) {
  19.         cout << msg;
  20.         if (cin >> x) return true;
  21.         if (cin.eof()) return false;
  22.         cin.clear();
  23.         cin.ignore(numeric_limits<streamsize>::max(), '\n');
  24.         cout << "Phai nhap so!\n";
  25.     }
  26. }
  27. string readLine(const string& msg) {
  28.     cout << msg;
  29.     string s;
  30.     getline(cin >> ws, s);
  31.     return s;
  32. }
  33.  
  34. struct Order { int id; string customer; double total; string status; };
  35. Order* findOrder(Order* ds,int n,int id){
  36.     for(int i=0;i<n;++i)if(ds[i].id==id)return &ds[i];
  37.     return nullptr;
  38. }
  39. void input(Order* ds,int n){
  40.     for(int i=0;i<n;++i){
  41.         cout<<"\nDon hang "<<i+1<<":\n";
  42.         while(true){if(!readInt("ID: ",ds[i].id))return;
  43.             if(findOrder(ds,i,ds[i].id)==nullptr)break;
  44.             cout<<"ID trung!\n";}
  45.         ds[i].customer=readLine("Ma khach hang: ");
  46.         do{if(!readDouble("Tong tien: ",ds[i].total))return;
  47.             if(ds[i].total<0)cout<<"Tong tien khong duoc am!\n";
  48.         }while(ds[i].total<0);
  49.         while(true){ds[i].status=readLine("Trang thai NEW/PROCESSING/SHIPPED/CANCELLED: ");
  50.             if(ds[i].status=="NEW"||ds[i].status=="PROCESSING"||
  51.                 ds[i].status=="SHIPPED"||ds[i].status=="CANCELLED")break;
  52.             cout<<"Trang thai khong hop le!\n";}
  53.     }
  54. }
  55. void printOrder(const Order& o){
  56.     cout<<o.id<<" | Customer: "<<o.customer<<" | Total: "<<o.total
  57.         <<" | Status: "<<o.status<<'\n';
  58. }
  59. void findAndShow(Order* ds,int n,bool isStaff,const string& currentCustomer){
  60.     int id;if(!readInt("ID don hang: ",id))return;
  61.     Order* p=findOrder(ds,n,id);
  62.     if(!p){cout<<"Khong tim thay!\n";return;}
  63.     if(!isStaff&&p->customer!=currentCustomer){cout<<"Khong co quyen xem don nay!\n";return;}
  64.     printOrder(*p);
  65. }
  66. void cancelOrder(Order* ds,int n,bool isStaff,const string& currentCustomer){
  67.     if(isStaff){cout<<"Chuc nang huy cua khach hang; staff dung chuc nang doi trang thai.\n";return;}
  68.     int id;if(!readInt("ID don muon huy: ",id))return;
  69.     Order* p=findOrder(ds,n,id);
  70.     if(!p){cout<<"Khong tim thay!\n";return;}
  71.     if(p->customer!=currentCustomer){cout<<"Khong duoc huy don nguoi khac!\n";return;}
  72.     if(p->status!="NEW"){cout<<"Chi duoc huy don NEW!\n";return;}
  73.     p->status="CANCELLED";cout<<"Da huy don!\n";
  74. }
  75. void changeStatus(Order* ds,int n,bool isStaff){
  76.     if(!isStaff){cout<<"Chi staff duoc doi trang thai!\n";return;}
  77.     int id;if(!readInt("ID don hang: ",id))return;
  78.     Order* p=findOrder(ds,n,id);
  79.     if(!p){cout<<"Khong tim thay!\n";return;}
  80.     if(p->status=="CANCELLED"){cout<<"Don da huy, khong doi trang thai!\n";return;}
  81.     string status=readLine("Trang thai moi NEW/PROCESSING/SHIPPED/CANCELLED: ");
  82.     if(status!="NEW"&&status!="PROCESSING"&&status!="SHIPPED"&&status!="CANCELLED"){
  83.         cout<<"Trang thai khong hop le!\n";return;}
  84.     p->status=status;cout<<"Da cap nhat trang thai!\n";
  85. }
  86. bool login(Order* ds,int n,bool& isStaff,string& currentCustomer){
  87.     int role;if(!readInt("1.Staff 2.Customer: ",role))return false;
  88.     if(role==1){string pass=readLine("Mat khau staff: ");
  89.         if(pass=="S123"){isStaff=true;currentCustomer="";return true;}}
  90.     if(role==2){
  91.         // Khong tin ma customer nguoi dung tu khai don thuan.
  92.         // PIN mo phong la C + ma khach hang, khong dung cho he thong that.
  93.         string customer=readLine("Ma khach hang: ");
  94.         string pin=readLine("PIN (demo: C + ma khach hang): ");
  95.         bool exists=false;
  96.         for(int i=0;i<n;++i)if(ds[i].customer==customer)exists=true;
  97.         if(exists&&pin=="C"+customer&&!customer.empty()){
  98.             isStaff=false;currentCustomer=customer;return true;
  99.         }
  100.     }
  101.     cout<<"Dang nhap that bai!\n";return false;
  102. }
  103. int main(){
  104.     int n;if(!readInt("Nhap n (1..1000): ",n)||n<1||n>1000)return 0;
  105.     Order* ds=new Order[n];input(ds,n);
  106.     int mainChoice=-1;
  107.     do{
  108.         if(!readInt("\n1.Dang nhap 0.Thoat: ",mainChoice))break;
  109.         if(mainChoice==1){bool isStaff=false;string currentCustomer;
  110.             if(!login(ds,n,isStaff,currentCustomer))continue;
  111.             int choice=-1;
  112.             do{
  113.                 if(!readInt("\n1.Tim/xem don 2.Huy don cua minh 3.Staff doi trang thai 0.Dang xuat: ",choice))break;
  114.                 switch(choice){
  115.                     case 1:findAndShow(ds,n,isStaff,currentCustomer);break;
  116.                     case 2:cancelOrder(ds,n,isStaff,currentCustomer);break;
  117.                     case 3:changeStatus(ds,n,isStaff);break;
  118.                     case 0:break;
  119.                     default:cout<<"Lua chon sai!\n";
  120.                 }
  121.             }while(choice!=0&&!cin.eof());
  122.         }else if(mainChoice!=0)cout<<"Lua chon sai!\n";
  123.     }while(mainChoice!=0&&!cin.eof());
  124.     delete[] ds;ds=nullptr;return 0;
  125. }
  126.  
  127.  
Success #stdin #stdout 0.01s 5288KB
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Standard input is empty
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Nhap n (1..1000):
https://ideone.com/yphVJa
quan ly don hang
language:
C++14 (clang 8.0)
created:
9 hours ago
visibility:
public

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