C Plus Plus Project : Library Manegement

Cpp Project: Library Management 

 #include<iostream>  
 #include<fstream>  
 #include<stdlib.h>  
 #include<string>  
 using namespace std;  
 class Library  
 {  
   char name[20];  
   char id[20];  
 public:  
   void get_data(void)  
   {  
     cout<<"NAME :";  
     cin>>name;  
     cout<<"ID :";  
     cin>>id;  
   }  
   void check_student()  
   {  
     {  
       if(id[7]=='6'&&id[8]=='0')  
         cout<<"You are a student of CSE Department\n";  
       else if(id[7]=='3'&&id[8]=='0')  
         cout<<"You are a student of EEE Department\n";  
       else if(id[7]=='4'&&id[8]=='0')  
         cout<<"You are astudent of ECE Department\n";  
       else if(id[7]=='1'&&id[8]=='0')  
         cout<<"You are astudent of BBA Department\n";  
       else if (id[7]=='7'&&id[8]=='7')  
         cout<<"You are astudent of pharmacy Department\n";  
       else if (id[7]=='5'&&id[8]=='0')  
         cout<<"You are astudent of ENGLISH Department\n";  
         else  
           {  
             cout<<"Invalid id";  
             exit(0);  
           }  
     }  
   }  
 };  
 class CSE: public Library  
 {  
 public:  
   void show_CSE()  
   {  
   fstream fp;  
   fp.open("CSE.txt");  
   string in;  
   if(fp.is_open())  
   {  
     while(fp.good())  
     {  
     getline(fp,in);  
     cout<<in<<"\n";  
     }  
   }  
 }  
 };  
 class EEE:public CSE  
 {  
 public:  
   void show_EEE()  
   {  
   ifstream fp;  
   fp.open("EEE.txt");  
   string in;  
   if(fp.is_open())  
   {  
     while(fp.good())  
     {  
     getline(fp,in);  
     cout<<in<<endl;  
     }  
   }  
   }  
 };  
 class BBA : public Library  
 {  
 public:  
   void show_BBA()  
   {  
   ifstream fp;  
   fp.open("BBA.txt");  
   string in;  
   if(fp.is_open())  
   {  
     while(fp.good())  
     {  
     getline(fp,in);  
     cout<<in<<endl;  
     }  
   }  
   }  
 };  
 class ECE: public BBA  
 {  
   public:  
   void show_ECE()  
   {  
   ifstream fp;  
   fp.open("ECE.txt");  
   string in;  
   if(fp.is_open())  
   {  
     while(fp.good())  
     {  
     getline(fp,in);  
     cout<<in<<endl;  
     }  
   }  
   }  
 };  
 class ECO : public BBA  
 {  
   public:  
   void show_ECO()  
   {  
   ifstream fp;  
   fp.open("ECO.txt");  
   string in;  
   if(fp.is_open())  
   {  
     while(fp.good())  
     {  
     getline(fp,in);  
     cout<<in<<endl;  
     }  
   }  
   }  
 };  
 class ENGLISH: public ECO  
 {  
   public:  
   void show_ENG()  
   {  
   ifstream fp;  
   fp.open("ENG.txt");  
   string in;  
   if(fp.is_open())  
   {  
     while(fp.good())  
     {  
     getline(fp,in);  
     cout<<in<<endl;  
     }  
   }  
   }  
 };  
 class other:public ENGLISH  
 {  
   public:  
   void show_other()  
   {  
   ifstream fp;  
   fp.open("other.txt");  
   string in;  
   if(fp.is_open())  
   {  
     while(fp.good())  
     {  
     getline(fp,in);  
     cout<<in<<endl;  
     }  
   }  
   }  
 };  
 int main()  
 {  
   cout<<"\t\t\t"<<" Library Manegement\n";  
   cout<<"\t\t\t"<<"---------------------\n";  
   char n;  
   Library lb;  
   lb.get_data();  
   lb.check_student();  
   cout<<"Choose witch department of book you are searching?";  
   cout<<"\n\n 01. CSE";  
   cout<<"\n\n 02. EEE";  
   cout<<"\n\n 03. BBA";  
   cout<<"\n\n 04. ECE";  
   cout<<"\n\n 05. ECO";  
   cout<<"\n\n 06. ENGLISH";  
   cout<<"\n\n 07. Other book";  
   cout<<"\n\n";  
   cout<<"Please input department code :";  
   cin>>n;  
   switch (n)  
   {  
   case '1':  
   {  
   CSE c;  
   c.show_CSE();  
   break;  
   }  
   case '2' :  
   {  
   EEE e;  
   e.show_EEE();  
   break;  
   }  
   case '3':  
   {  
   BBA b;  
   b.show_BBA();  
   break;  
   }  
   case '4':  
   {  
     ECE ec;  
     ec.show_ECE();  
     break;  
   }  
   case '5':  
   {  
     ECO e;  
     e.show_ECO();  
     break;  
   }  
   case '6':  
   {  
     ENGLISH eg;  
     eg.show_ENG();  
     break;  
   }  
   case '7':  
   {  
     other o;  
     o.show_other();  
     break;  
   }  
   }  
   return 0;  
 }