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

This is a discussion on A mini data-base handler. Very primitive but it works. within the C++ Programming forums, part of the General Programming Boards category; When you put data in double enter is needed. Pass that mistake. Code: #include<iostream> using namespace std; struct book { ...

  1. #1
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    Cool 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();
     
        }

  2. #2
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    The prototypes would be first and after main the function definitions. I know.

  3. #3
    and the hat of int overfl Salem's Avatar
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    Your indentation still needs work.
    SourceForge.net: Indentation - cpwiki

    Tip - if you're using some kind of IDE, then set it to use "spaces for tabs" in the indentation.
    If you mix spaces and real tabs in source code, it may look OK in your editor, but it will be a mess when posted online.

    Oh, and don't use goto's to generate a while loop, and don't call main() recursively.
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.
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