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  1. #include<bits/stdc++.h>
  2. //Phan Thanh Nhàn 
  3. using namespace std;
  4. #define MAX_SV 100
  5. struct SINHVIEN {
  6.     string MaSV, GioiTinh, HoTenSV, NamSinh;
  7.     double TrungBinhHK;
  8. };
  9.  
  10. string dang_nhap(const string& tenFile) {
  11.     ifstream file(tenFile);
  12.     if (!file) {
  13.         cerr << "Khong the mo file dang nhap!" << endl;
  14.         return "";
  15.     }
  16.     map<string, string> taiKhoan;
  17.     string maSV, matKhau;
  18.     while (file >> maSV >> matKhau) {
  19.         taiKhoan[maSV] = matKhau;
  20.     }
  21.     file.close();
  22.  
  23.     int soLanSai = 0;
  24.     while (soLanSai < 5) {
  25.         string nhapMaSV, nhapMatKhau;
  26.         cout << "Nhap ma sinh vien: ";
  27.         cin >> nhapMaSV;
  28.         cout << "Nhap mat khau: ";
  29.         cin >> nhapMatKhau;
  30.  
  31.         if (taiKhoan.find(nhapMaSV) != taiKhoan.end() && taiKhoan[nhapMaSV] == nhapMatKhau) {
  32.             cout << "Dang nhap thanh cong!\n";
  33.             return nhapMaSV;
  34.         } else {
  35.             cout << "Sai ma sinh vien hoac mat khau. Thu lai!\n";
  36.             soLanSai++;
  37.         }
  38.     }
  39.     cout << "Ban da nhap sai qua 5 lan. Thoat chuong trinh!\n";
  40.     return "";
  41. }
  42.  
  43. int nhap_TT(const string& tenFile, SINHVIEN danhSach[], int &soLuong) {
  44.     ifstream file(tenFile);
  45.     if (!file) {
  46.         cerr << "Khong the mo file!" << endl;
  47.         return 0;
  48.     }
  49.     string maSV, gioiTinh, namSinh, hoTen;
  50.     soLuong = 0;
  51.     while (file >> maSV >> gioiTinh >> namSinh) {
  52.         getline(file >> ws, hoTen);
  53.         danhSach[soLuong].MaSV = maSV;
  54.         danhSach[soLuong].GioiTinh = gioiTinh;
  55.         danhSach[soLuong].NamSinh = namSinh;
  56.         danhSach[soLuong].HoTenSV = hoTen;
  57.         danhSach[soLuong].TrungBinhHK = 0.0;
  58.         soLuong++;
  59.     }
  60.     file.close();
  61.     return soLuong;
  62. }
  63.  
  64. void nhap_diem(const string& tenFile, SINHVIEN danhSach[], int soLuong) {
  65.     ifstream file(tenFile);
  66.     if (!file) {
  67.         cerr << "Khong the mo file diem!" << endl;
  68.         return;
  69.     }
  70.     string maSV;
  71.     double ktlt, mmt, ctdl;
  72.     while (file >> maSV >> ktlt >> mmt >> ctdl) {
  73.         for (int i = 0; i < soLuong; i++) {
  74.             if (danhSach[i].MaSV == maSV) {
  75.                 danhSach[i].TrungBinhHK = (ktlt * 4 + mmt * 3 + ctdl * 3) / 10.0;
  76.                 break;
  77.             }
  78.         }
  79.     }
  80.     file.close();
  81. }
  82.  
  83. void xuat(const SINHVIEN& sv) {
  84.     cout << "MaSV: " << sv.MaSV << "\n"
  85.          << "GioiTinh: " << sv.GioiTinh << "\n"
  86.          << "HoTenSV: " << sv.HoTenSV << "\n"
  87.          << "NamSinh: " << sv.NamSinh << "\n"
  88.          << fixed << setprecision(2)
  89.          << "TrungBinhHK: " << sv.TrungBinhHK << "\n";
  90.     cout << "--------------------------\n";
  91. }
  92.  
  93. void them_sinh_vien(SINHVIEN danhSach[], int &soLuong) {//1
  94.     if (soLuong >= MAX_SV) {
  95.         cout << "Danh sach da day, khong the them sinh vien!\n";
  96.         return;
  97.     }
  98.     cout << "Nhap MaSV: ";
  99.     cin >> danhSach[soLuong].MaSV;
  100.     for (int i = 0; i < soLuong; i++) {
  101.         if (danhSach[i].MaSV == danhSach[soLuong].MaSV) {
  102.             cout << "MaSV da ton tai! Them that bai.\n";
  103.             return;
  104.         }
  105.     }
  106.     cout << "Nhap ho ten: ";
  107.     cin.ignore();
  108.     getline(cin, danhSach[soLuong].HoTenSV);
  109.     cout << "Nhap gioi tinh: ";
  110.     cin >> danhSach[soLuong].GioiTinh;
  111.     cout << "Nhap nam sinh: ";
  112.     cin >> danhSach[soLuong].NamSinh;
  113.     double ktlt, mmt, ctdl;
  114.     cout << "Nhap diem KTLT: ";
  115.     cin >> ktlt;
  116.     cout << "Nhap diem MMT: ";
  117.     cin >> mmt;
  118.     cout << "Nhap diem CTDL: ";
  119.     cin >> ctdl;
  120.     danhSach[soLuong].TrungBinhHK = (ktlt * 4 + mmt * 3 + ctdl * 3) / 10.0;
  121.     soLuong++;
  122.     cout << "Them sinh vien thanh cong!\n";
  123. }
  124.  
  125. void cap_nhat_sinh_vien(SINHVIEN danhSach[], int soLuong) {//2
  126.     string maSV;
  127.     cout << "Nhap MaSV can cap nhat: ";
  128.     cin >> maSV;
  129.     for (int i = 0; i < soLuong; i++) {
  130.         if (danhSach[i].MaSV == maSV) {
  131.             cout << "Nhap ho ten moi: ";
  132.             cin.ignore();
  133.             getline(cin, danhSach[i].HoTenSV);
  134.             cout << "Nhap gioi tinh moi: ";
  135.             cin >> danhSach[i].GioiTinh;
  136.             cout << "Nhap nam sinh moi: ";
  137.             cin >> danhSach[i].NamSinh;
  138.             double ktlt, mmt, ctdl;
  139.             cout << "Nhap diem KTLT moi: ";
  140.             cin >> ktlt;
  141.             cout << "Nhap diem MMT moi: ";
  142.             cin >> mmt;
  143.             cout << "Nhap diem CTDL moi: ";
  144.             cin >> ctdl;
  145.             danhSach[i].TrungBinhHK = (ktlt * 4 + mmt * 3 + ctdl * 3) / 10.0;
  146.             cout << "Cap nhat thanh cong!\n";
  147.             return;
  148.         }
  149.     }
  150.     cout << "Khong tim thay sinh vien voi MaSV: " << maSV << "\n";
  151. }
  152.  
  153. void tim_kiem_sinh_vien(SINHVIEN danhSach[], int soLuong) {//3
  154.     string maSV;
  155.     cout << "Nhap MaSV can tim: ";
  156.     cin >> maSV;
  157.     for (int i = 0; i < soLuong; i++) {
  158.         if (danhSach[i].MaSV == maSV) {
  159.             xuat(danhSach[i]);
  160.             return;
  161.         }
  162.     }
  163.     cout << "Khong tim thay sinh vien voi MaSV: " << maSV << "\n";
  164. }
  165.  
  166. void xoa_sinh_vien(SINHVIEN danhSach[], int &soLuong) {//4
  167.     string maSV;
  168.     cout << "Nhap MaSV can xoa: ";
  169.     cin >> maSV;
  170.     for (int i = 0; i < soLuong; i++) {
  171.         if (danhSach[i].MaSV == maSV) {
  172.             for (int j = i; j < soLuong - 1; j++) {
  173.                 danhSach[j] = danhSach[j + 1];
  174.             }
  175.             soLuong--;
  176.             cout << "Xoa sinh vien thanh cong!\n";
  177.             return;
  178.         }
  179.     }
  180.     cout << "Khong tim thay sinh vien voi MaSV: " << maSV << "\n";
  181. }
  182.  
  183. void hien_thi_khong_canh_bao(SINHVIEN danhSach[], int soLuong) {//
  184.     bool coSV = false;
  185.     cout << "Danh sach sinh vien khong canh bao hoc tap:\n";
  186.     for (int i = 0; i < soLuong; i++) {
  187.         if (danhSach[i].TrungBinhHK >= 4.0) {
  188.             xuat(danhSach[i]);
  189.             coSV = true;
  190.         }
  191.     }
  192.     if (!coSV)
  193.         cout << "Khong co sinh vien nao khong bi canh bao hoc tap!\n";
  194.  
  195. }
  196.  
  197. void xuat_danh_sach_sinh_vien_ra_file(SINHVIEN danhSach[], int soLuong) {
  198.     ofstream file("thongtinSV_export.txt");
  199.     if (!file) {
  200.         cerr << "Khong the mo file de ghi!" << endl;
  201.         return;
  202.     }
  203.     for (int i = 0; i < soLuong; i++) {
  204.         file << danhSach[i].MaSV << " "
  205.              << danhSach[i].GioiTinh << " "
  206.              << danhSach[i].NamSinh << " "
  207.              << danhSach[i].HoTenSV << " "
  208.              << fixed << setprecision(2) << danhSach[i].TrungBinhHK << "\n";
  209.     }
  210.     file.close();
  211.     cout << "Da xuat danh sach sinh vien ra file thongtinSV_export.txt thanh cong!\n";
  212. }
  213.  
  214. void menu_giang_vien(SINHVIEN danhSach[], int &soLuong) {
  215.    int luaChon;
  216.     do {
  217.         cout << "\n_____ MENU GIANG VIEN _____\n";
  218.         cout << "1. Them sinh vien\n";
  219.         cout << "2. Cap nhat thong tin sinh vien\n";
  220.         cout << "3. Tim kiem sinh vien theo MaSV\n";
  221.         cout << "4. Xoa sinh vien\n";
  222.         cout << "5. Hien thi sinh vien khong canh bao hoc tap\n";
  223.         cout << "6. Xuat danh sach sinh vien ra file.\n";
  224.         cout << "7. Thoat\n";
  225.         cout << "===========================\n";
  226.         cout << "Nhap lua chon: ";
  227.         cin >> luaChon;
  228.  
  229.         switch (luaChon) {
  230.             case 1:
  231.                 them_sinh_vien(danhSach, soLuong);
  232.                 break;
  233.             case 2:
  234.                 cap_nhat_sinh_vien(danhSach, soLuong);
  235.                 break;
  236.             case 3:
  237.                 tim_kiem_sinh_vien(danhSach, soLuong);
  238.                 break;
  239.             case 4:
  240.                 xoa_sinh_vien(danhSach, soLuong);
  241.                 break;
  242.             case 5:
  243.                 hien_thi_khong_canh_bao(danhSach, soLuong);
  244.                 break;
  245.             case 6:
  246.                 xuat_danh_sach_sinh_vien_ra_file(danhSach, soLuong);
  247.                 break;
  248.             case 7:
  249.                 cout << "THOAT\n";    
  250.                 break;
  251.             default:
  252.                 cout << "Lua chon khong hop le. Vui long chon lai!\n";
  253.         }
  254.     } while (luaChon != 7);
  255. }
  256.  
  257. int main() {
  258.     SINHVIEN danhSach[MAX_SV];
  259.     int soLuong = 0;
  260.     string fileDangNhap = "dangnhap.txt";
  261.     string fileDiem = "diemso.txt";
  262.     string fileThongTin = "thongtinSV.txt";
  263.     string maSV = dang_nhap(fileDangNhap);
  264.     string inf="thongtinSV_export.txt"; 
  265.     if (maSV.empty())		return 0;
  266.     soLuong = nhap_TT(fileThongTin, danhSach, soLuong);
  267.     nhap_diem(fileDiem, danhSach, soLuong);
  268.     if (maSV == "11377")
  269.         menu_giang_vien(danhSach, soLuong);
  270.     else{
  271.         for (int i = 0; i < soLuong; i++)
  272.             if (danhSach[i].MaSV == maSV) {
  273.                 xuat(danhSach[i]);
  274.                 break;
  275.        }
  276.     }
  277. }    
  278.  
  279.  
  280.  
  281.  
  282.  
  283.  
Success #stdin #stdout #stderr 0s 5292KB
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Khong the mo file dang nhap!
https://ideone.com/TJBv4R
language:
C++14 (gcc 8.3)
created:
4 days ago
visibility:
public

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