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  1. #include<bits/stdc++.h>
  2. //Phan Thanh Nhan k24
  3. using namespace std;
  4. #define MAX_SV 100
  5. #define MAX_TAI_KHOAN 100
  6. struct SINHVIEN {
  7.     string MaSV, GioiTinh, HoTenSV, NamSinh;
  8.     double TrungBinhHK;
  9. };
  10.  
  11. string dang_nhap(const string& tenFile);
  12. int nhap_TT(const string& tenFile, SINHVIEN danhSach[], int &soLuong); 
  13. void nhap_diem(const string& tenFile, SINHVIEN danhSach[], int soLuong);
  14. void xuat(const SINHVIEN& sv);
  15. void them_sinh_vien(SINHVIEN danhSach[], int &soLuong);//1
  16. void cap_nhat_sinh_vien(SINHVIEN danhSach[], int soLuong);//2
  17. void tim_kiem_sinh_vien(SINHVIEN danhSach[], int soLuong);//3
  18. void xoa_sinh_vien(SINHVIEN danhSach[], int &soLuong);//4
  19. void hien_thi_khong_canh_bao(SINHVIEN danhSach[], int soLuong);//5
  20. void xuat_danh_sach_sinh_vien_ra_file(SINHVIEN danhSach[], int soLuong);//6
  21. void menu_giang_vien(SINHVIEN danhSach[], int &soLuong); //menu + 7
  22.  
  23. int main() {
  24.     SINHVIEN danhSach[MAX_SV];
  25.     int soLuong = 0;
  26.     string fileDangNhap = "dangnhap.txt";
  27.     string fileDiem = "diemso.txt";
  28.     string fileThongTin = "thongtinSV.txt";
  29.     string inf="thongtinSV_export.txt"; //file output
  30.     string maSV = dang_nhap(fileDangNhap);
  31.  
  32.     if (maSV.empty())		return 0;
  33.  
  34.     soLuong = nhap_TT(fileThongTin, danhSach, soLuong);
  35.     nhap_diem(fileDiem, danhSach, soLuong);
  36.     if (maSV == "11377")
  37.         menu_giang_vien(danhSach, soLuong);
  38.     else{
  39.         for (int i = 0; i < soLuong; i++)
  40.             if (danhSach[i].MaSV == maSV){
  41.                 xuat(danhSach[i]);		break;
  42.         }
  43.     }
  44. }  
  45.  
  46.  
  47. string dang_nhap(const string& tenFile) {
  48.     ifstream file(tenFile);
  49.     if (!file) {
  50.         cerr << "Khong the mo file dang nhap!" << endl;
  51.         return "";
  52.     }
  53.     string maSVs[MAX_TAI_KHOAN], matKhaus[MAX_TAI_KHOAN];
  54.     int soLuongTaiKhoan = 0;
  55.     while (file>>maSVs[soLuongTaiKhoan]>>matKhaus[soLuongTaiKhoan]){
  56.         soLuongTaiKhoan++;
  57.     }
  58.     file.close();
  59.  
  60.     int soLanSai = 0;
  61.     while (soLanSai < 5) {
  62.         string nhapMaSV, nhapMatKhau;
  63.         cout<<"Nhap ma sinh vien: ";
  64.         cin>>nhapMaSV;
  65.         cout<<"Nhap mat khau: ";
  66.         cin>>nhapMatKhau;
  67.  
  68.         for (int i=0;i<soLuongTaiKhoan;i++) {
  69.             if (maSVs[i] == nhapMaSV && matKhaus[i] == nhapMatKhau) {
  70.                 cout << "Dang nhap thanh cong!\n";
  71.                 return nhapMaSV;
  72.             }
  73.         }
  74.         cout << "Sai ma sinh vien hoac mat khau. Thu lai!\n";
  75.         soLanSai++;
  76.     }
  77.     cout << "Ban da nhap sai qua 5 lan. Thoat chuong trinh!\n";
  78.     return "";
  79. }
  80.  
  81. int nhap_TT(const string& tenFile, SINHVIEN danhSach[], int &soLuong) {
  82.     ifstream file(tenFile);
  83.     if (!file) {
  84.         cerr << "Khong the mo file!" << endl;
  85.         return 0;
  86.     }
  87.     string maSV, gioiTinh, namSinh, hoTen;
  88.     soLuong = 0;
  89.     while (file>>maSV>>gioiTinh>>namSinh) {
  90.         getline(file>> ws, hoTen);
  91.         danhSach[soLuong].MaSV = maSV;
  92.         danhSach[soLuong].GioiTinh = gioiTinh;
  93.         danhSach[soLuong].NamSinh = namSinh;
  94.         danhSach[soLuong].HoTenSV = hoTen;
  95.         danhSach[soLuong].TrungBinhHK = 0.0;
  96.         soLuong++;
  97.     }
  98.     file.close();
  99.     return soLuong;
  100. }
  101.  
  102. void nhap_diem(const string& tenFile, SINHVIEN danhSach[], int soLuong) {
  103.     ifstream file(tenFile);
  104.     if (!file) {
  105.         cerr << "Khong the mo file diem!" << endl;
  106.         return;
  107.     }
  108.     string maSV;
  109.     double ktlt, mmt, ctdl;
  110.     while (file >> maSV >> ktlt >> mmt >> ctdl) {
  111.         for (int i = 0; i < soLuong; i++) {
  112.             if (danhSach[i].MaSV == maSV) {
  113.                 danhSach[i].TrungBinhHK = (ktlt * 4 + mmt * 3 + ctdl * 3) / 10.0;
  114.                 break;
  115.             }
  116.         }
  117.     }
  118.     file.close();
  119. }
  120.  
  121. void xuat(const SINHVIEN& sv) {
  122.     cout<< "MaSV: "<<sv.MaSV << "\n"
  123.         << "GioiTinh: "<<sv.GioiTinh<< "\n"
  124.         << "HoTenSV: "<<sv.HoTenSV<< "\n"
  125.         << "NamSinh: "<<sv.NamSinh<< "\n"
  126.         << fixed << setprecision(2)
  127.         << "TrungBinhHK: " << sv.TrungBinhHK << "\n";
  128.     cout << "____________________________________\n";
  129. }
  130.  
  131. void them_sinh_vien(SINHVIEN danhSach[], int &soLuong) {//1
  132.     if (soLuong >= MAX_SV) {
  133.         cout << "Danh sach da day, khong the them sinh vien!\n";
  134.         return;
  135.     }
  136.     cout << "Nhap MaSV: ";
  137.     cin >> danhSach[soLuong].MaSV;
  138.     for (int i = 0; i < soLuong; i++){
  139.         if (danhSach[i].MaSV == danhSach[soLuong].MaSV){
  140.             cout << "MaSV da ton tai! Them that bai.\n";
  141.             return;
  142.         }
  143.     }
  144.     cout << "Nhap ho ten: ";
  145.     cin.ignore();
  146.     getline(cin, danhSach[soLuong].HoTenSV);
  147.     cout<<"Nhap gioi tinh: ";	cin>>danhSach[soLuong].GioiTinh;
  148.     cout<<"Nhap nam sinh: ";	cin>>danhSach[soLuong].NamSinh;
  149.     double ktlt, mmt, ctdl;
  150.     cout<<"Nhap diem KTLT: ";	cin>>ktlt;
  151.     cout<<"Nhap diem MMT: ";	cin>>mmt;
  152.     cout<<"Nhap diem CTDL: ";	cin>>ctdl;
  153.     danhSach[soLuong].TrungBinhHK = (ktlt*4 + mmt*3 + ctdl*3)/10.0;
  154.     soLuong++;
  155.     cout << "Them sinh vien thanh cong!\n";
  156. }
  157.  
  158.  
  159. void cap_nhat_sinh_vien(SINHVIEN danhSach[], int soLuong) {//2
  160.     string maSV;
  161.     cout << "Nhap MaSV can cap nhat: ";
  162.     cin >> maSV;
  163.     for (int i = 0; i < soLuong; i++) {
  164.         if (danhSach[i].MaSV == maSV) {
  165.             cout << "Nhap ho ten moi: ";
  166.             cin.ignore();
  167.             getline(cin, danhSach[i].HoTenSV);
  168.             cout << "Nhap gioi tinh moi: ";
  169.             cin >> danhSach[i].GioiTinh;
  170.             cout << "Nhap nam sinh moi: ";
  171.             cin >> danhSach[i].NamSinh;
  172.             double ktlt, mmt, ctdl;
  173.             cout << "Nhap diem KTLT moi: ";
  174.             cin >> ktlt;
  175.             cout << "Nhap diem MMT moi: ";
  176.             cin >> mmt;
  177.             cout << "Nhap diem CTDL moi: ";
  178.             cin >> ctdl;
  179.             danhSach[i].TrungBinhHK = (ktlt * 4 + mmt * 3 + ctdl * 3) / 10.0;
  180.             cout << "Cap nhat thanh cong!\n";
  181.             return;
  182.         }
  183.     }
  184.     cout << "Khong tim thay sinh vien voi MaSV: " << maSV << "\n";
  185. }
  186.  
  187.  
  188. void tim_kiem_sinh_vien(SINHVIEN danhSach[], int soLuong) {//3
  189.     string maSV;
  190.     cout<<"Nhap MaSV can tim: ";
  191.     cin>>maSV;
  192.     for (int i = 0; i < soLuong; i++)
  193.         if (danhSach[i].MaSV == maSV){
  194.             xuat(danhSach[i]);	return;
  195.     }
  196.     cout << "Khong tim thay sinh vien voi MaSV: " << maSV << "\n";
  197. }
  198.  
  199. void xoa_sinh_vien(SINHVIEN danhSach[], int &soLuong) {//4
  200.     string maSV;
  201.     cout<<"Nhap MaSV can xoa: ";	cin>>maSV;
  202.     for (int i = 0; i < soLuong; i++){
  203.         if (danhSach[i].MaSV == maSV){
  204.             for (int j = i; j < soLuong - 1; j++){
  205.                 danhSach[j] = danhSach[j + 1];
  206.             }
  207.             soLuong--;
  208.             cout<<"Xoa sinh vien thanh cong!\n";
  209.             return;
  210.         }
  211.     }
  212.     cout << "Khong tim thay sinh vien voi MaSV: " << maSV << "\n";
  213. }
  214.  
  215. void hien_thi_khong_canh_bao(SINHVIEN danhSach[], int soLuong) {//5
  216.     bool coSV = false;
  217.     cout << "Danh sach sinh vien khong canh bao hoc tap:\n";
  218.     for (int i = 0; i < soLuong; i++){
  219.         if (danhSach[i].TrungBinhHK >= 4.0) {
  220.             xuat(danhSach[i]);
  221.             coSV = true;
  222.         }
  223.     }
  224.     if (!coSV)		
  225. 		cout << "Khong co sinh vien nao khong bi canh bao hoc tap!\n";
  226. }
  227.  
  228. void xuat_danh_sach_sinh_vien_ra_file(SINHVIEN danhSach[], int soLuong){//6
  229.     ofstream file("thongtinSV_export.txt");
  230.     if (!file) {
  231.         cerr << "Khong the mo file de ghi!" << endl;
  232.         return;
  233.     }
  234.     for (int i = 0; i < soLuong; i++) {
  235.         file<<danhSach[i].MaSV << " "
  236.             <<danhSach[i].GioiTinh << " "
  237.             <<danhSach[i].NamSinh << " "
  238.             <<danhSach[i].HoTenSV << " "
  239.             <<fixed<<setprecision(2)<<danhSach[i].TrungBinhHK<< "\n";
  240.     }
  241.     file.close();
  242.     cout<<"Da xuat danh sach sinh vien ra file thongtinSV_export.txt thanh cong!\n";
  243. }
  244.  
  245. void menu_giang_vien(SINHVIEN danhSach[], int &soLuong) {
  246.    int luaChon;
  247.     do {
  248.         cout<<"\n_____ MENU GIANG VIEN _____\n";
  249.         cout<<"1. Them sinh vien\n";
  250.         cout<<"2. Cap nhat thong tin sinh vien\n";
  251.         cout<<"3. Tim kiem sinh vien theo MaSV\n";
  252.         cout<<"4. Xoa sinh vien\n";
  253.         cout<<"5. Hien thi sinh vien khong canh bao hoc tap\n";
  254.         cout<<"6. Xuat danh sach sinh vien ra file.\n";
  255.         cout<<"7. Thoat\n";
  256.         cout<<"===========================\n";
  257.         cout<< "Nhap lua chon: ";
  258.         cin >> luaChon;
  259.         switch (luaChon){
  260.             case 1:
  261.                 them_sinh_vien(danhSach, soLuong);
  262.                 break;
  263.             case 2:
  264.                 cap_nhat_sinh_vien(danhSach, soLuong);
  265.                 break;
  266.             case 3:
  267.                 tim_kiem_sinh_vien(danhSach, soLuong);
  268.                 break;
  269.             case 4:
  270.                 xoa_sinh_vien(danhSach, soLuong);
  271.                 break;
  272.             case 5:
  273.                 hien_thi_khong_canh_bao(danhSach, soLuong);
  274.                 break;
  275.             case 6:
  276.                 xuat_danh_sach_sinh_vien_ra_file(danhSach, soLuong);
  277.                 break;
  278.             case 7:
  279.                 cout << "THOAT\n";    
  280.                 break;
  281.             default:
  282.                 cout << "Lua chon khong hop le. Vui long chon lai!\n";
  283.         }
  284.     } while (luaChon != 7);
  285. }  
  286.  
Success #stdin #stdout #stderr 0.01s 5284KB
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Khong the mo file dang nhap!
https://ideone.com/t67Tzy
language:
C++14 (gcc 8.3)
created:
4 days ago
visibility:
public

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