継承と演算子のオーバーロードまたは例外処理を使用したアドレス帳

Question

C++を使用してアドレス帳を作成する必要があり、クラスと継承クラスを含める必要があります。メインクラスには名前と住所が含まれており、教師クラスには教師の電話番号とCNICが含まれ、従業員クラスには電話とCNICが含まれ、Studentクラスには学生IDと電話番号が含まれます。私はC++でプログラムを作ったが、それは前のデータを書き込むことが常に終わるだろう。私はここで立ち往生している。頭蓋骨プログラムや簡単なアルゴリズムが必要です。

これは私のコードです。

  // new.cpp : Defines the entry point for the console application. 

      // Address Book.cpp : Defines the entry point for the console application. 
      // 

      #include "stdafx.h" 
      #include<iostream> 
      #include<string> 
      #include <conio.h> 
      #include <fstream> 
      #include <sstream> 
      #include <iomanip> 

      using namespace std; 

      class Main 
      { 
       private: 
       string Name; 
       string Address; 
       char test; 

       public: 
       virtual void getdata() 
       { 
        ofstream outfile("TEMP.txt"); 
        cout <<"Enter Name: " ; 
        cin>>test; 
        getline(cin, Name); //cin >> Name; 
        cout << endl; 
        cout << "Enter Address: "; 
        getline(cin, Address);// cin >> Address; 

        outfile << Name 
        << endl 
        << Address; 
       } 
       virtual void setdata() 
        { 
        cout << "\n\nName: " << test+Name; 
        cout << "\nAddress: " << Address; 
        } 


       virtual void remove() 
       { 



       } 
       }; 


      //---------------------------------------------------------- 

      class Teacher : public Main 
      { 
      private: 

       int T_Number; 
       string T_CNIC; 

      public: 
       void getdata() 
       { 
       ofstream outfile("Teacher.txt"); 
       Main::getdata(); 
       cout << "Enter CNIC: "; 
       getline(cin,T_CNIC);//cin >> T_CNIC; 
       cout << "Enter Contact Number: " << endl; 
       cin >> T_Number; 

       outfile << T_CNIC 
        << endl 
        << T_Number; 

       cout << "Data entered" << endl; 

       } 

       void setdata() 
       { 
        Main::setdata(); 
        cout << "\nTeacher CNIC: " << T_CNIC; 
        cout << "\nTeacher Contact Number: " << T_Number; 
        } 
       }; 
      //------------------------------------------------------------ 

      class Student : public Main 
      { 

      private: 

      int S_Number; 
      int S_ID; 
      public: 
      void getdata() 
      { 
       ofstream outfile("Student.txt"); 
       Main::getdata(); 
       cout << "Enter ID: "; 
       cin >> S_ID; 
       cout << "Enter Contact Number: "; 
       cin >> S_Number; 

       outfile << S_ID 
        << endl 
        << S_Number; 

       cout << "Data entered" << endl; 

      } 
      void setdata() 
      { 
       Main::setdata(); 
       cout << "\nStudent Unique ID: " << S_ID; 
       cout << "\nStudent Contact Number: " << S_Number; 
      } 

      }; 

      class Employee : public Main 
      { 
      private: 
      int E_Number; 
      string E_CNIC; 
      public: 
      void getdata() 
      { 
       ofstream outfile("Employee.txt"); 
       Main::getdata(); 
       cout << "Enter Employee CNIC: "; 
       getline(cin,E_CNIC);//cin >> E_CNIC; 
       cout << "Enter Contact Number: "; 
       cin >> E_Number; 

       outfile << E_CNIC 
        << endl 
        << E_Number; 

       cout << "Data entered" << endl; 

       ;} 
      void setdata() 
      { 
       Main::setdata(); 
       cout << "\nEmployee Unique ID: " << E_CNIC; 
       cout << "\nEmployee Contact Number: " << E_Number; 

      } 
      }; 



      //----------------------------------------------------------------------------------------- 

      int _tmain(int argc, _TCHAR* argv[]) 
      { 
      Main* myarr[100]; 

      int var = 0; 

      int choice; 
       char input; 
      start: 
       printf("===============MAIN MENU==============="); 
       printf("\n[1]Insert\n[2]Search\n[3]Delete\n[4]Exit\n"); 
       printf("======================================="); 
       printf("\n\nEnter Your Choice: "); 
       cin >> choice; 

       switch(choice) 
       { 

       case 1: 
        cout << "\nEnter data for Student or Teacher or Employee (s/t/e)? "; 
        cin >> input; 
       do 
       { 


        if(input=='t') 
        myarr[var] = new Teacher; 
        else if (input == 'e') 
        myarr[var] = new Employee; 
        else 
        myarr[var] = new Student; 
        myarr[var++]->getdata(); 
        cout << " Enter another (y/n)? "; 
        cin >> input; 
        if(input == 'n') 
        { 
         goto start; 
        } 
       } 
       while(input =='y'); 
        for(int j=0; j<var; j++) 
        myarr[j]->setdata(); 
        cout << endl; 
        break; 

       case 2: 
        return 0; 
        break; 

       case 3: 
        return 0; 
        break; 

       case 4: 
        cout << "Are you sure you want to quit? " << endl; 
        getch(); 
        break; 

       default: 
        cout << "Choose from 1 - 4 ONLY!!" << endl; 
        goto start; 
        break; 



       } 
      return 0; 
      } 

Answer 1

次に、保護されたと宣言し、main :: getdata（）を呼び出す代わりに、ファイルに直接データを書き込んでみます。それが動作するかどうかを確認します。