Thread: A mini data-base handler. Very primitive but it works.

When you put data in double enter is needed. Pass that mistake.

Code:

#include<iostream>
using namespace std;

  struct book {
           string author;
           string title;
           string publisher;
           int pubyear;
           float price;
           };
                      
  char op = 'a';   bool idcall=0;  int i=0;
  book *B;
  
  bool choice(char, bool);
  int main();
           
void datainput(){     
                  int n=0;       
                  book *A; A = new book[i]; B = new book[i]; 
    do{        
        delete[] B;           
        B = new book[i+1];
                   
        cout<<"\n Author: "; getline(cin, B[i].author); cin.ignore();
        cout<<" Title: "; getline(cin, B[i].title); cin.ignore();
        cout<<" Publisher: ";getline(cin, B[i].publisher); cin.ignore();
        cout<<" Publication year: ";cin>> B[i].pubyear; cin.ignore();
        cout<<"\n Price: "; cin>>B[i].price; cin.ignore();
        
                     n=i;
                     if(i!=0)for(i-=1;i>=0;i--)B[i]=A[i];
                     i=n;  delete[] A;                 
                           if(n==0){A = new book[i+1];A[i]=B[i];}
                           else {A = new book[n+1]; for(;n>=0;n--) A[n]=B[n];}                          
                                     i++;
       cout<<"\n\n Would you like to register futher more? (y for Yes, n for No): "; cin>>op; cin.ignore(); idcall=1;
       choice(op, idcall);       
      }while(idcall==0); main();
     
                } 
                
bool choice(char op, bool idcall){
     entry:
     switch(op){
                   case 'y': if(idcall==0) datainput();
                             else {::idcall=0; return(idcall);}
                   case 'n': if(idcall==0) exit(0);
                             else return(idcall);
                   default: cout<<"\n Read more careful, please."; 
                            if(idcall==0) cout<<" Would you like to put data in? (y for Yes, n for No): "; cin>>op; cin.ignore(); break;
                            if(idcall==1) cout<<" Would you like to register futher more? (y for Yes, n for No): "; cin>>op; break;
                             }
                   goto entry;
                                             
                   }     
          
int main(){ 
    
             if(idcall==1) goto lastpart;
             
             cout<<" The database editor is ready.\n Are you sure that you would like to put data in? (y for Yes, n for No): ";
             cin>>op; cin.ignore(); choice(op, 0);

lastpart:             
        for(i-=1;i>=0;i--){cout<<endl<<"\n Author: "<<B[i].author;cout<<endl<<"\n Title: "<<B[i].title; cout<<endl<<"\n Publisher: "<<B[i].publisher;
                           cout<<endl<<"\n Publication year: "<<B[i].pubyear;cout<<endl<<"\n Price: "<<B[i].price;cout<<"\n\n";}   
             
    cin.get();
 
    }

The prototypes would be first and after main the function definitions. I know.