C++ Question with uncomplete answer..anyone can solve it?

(1)Let the user enter the ISBN, the system will trace the title and price of the book automatically. The system should check whether the book is in the stock or not. If it is not, please let the user to enter again.
(2)Allow a customer to buy more than one item from the bookshop.
(2)Calculate and print the bill. The billing amount should include 5% tax.

Here The Sample Output:

Welcome to Billy’BookShop

Please enter the ISBN: 0128
The title is C++ How to Program
The Price is RM 108.90

Do you wish to continue? y/n
y

Please enter the ISBN: 0992
The title is Introduction to Java Programming
The Price is RM 89.60

Do you wish to continue? y/n
n

Your Receipt:

0128 RM 108.90
0992 RM 89.60
Total RM 198.50
Tax RM 9.92

Total RM 208.42

THANK YOU!!!

Code:

---

#include <iostream>
#include <fstream>
#include <iomanip>

using namespace std;

int main()
{
    double ISDN ;
    char title;
    float price;
       
        cout<<"---Welcome To Billy's Bookshop---\n";
        cout<<"Please enter the ISDN: ";
        cin>>ISDN;

        if (ISDN==12)
        {
                cout<<"The Title is C++ How to Program"<<endl<<"The Price is RM 108.90"<<endl;
        }
    if (ISDN==98)
        {
                cout<<"The Title is Introduction to Java Programming"<<endl<<"The Price is RM 89.60"<<endl;
        }
        else
        {               
                cout<<"Not Valid"<<endl;
        }
        return 0;
}

---

Hope someone will complete the answer...see who got it?
:confused: :confused: :confused: :confused: :confused:

Quote:

---

Originally Posted by jason07

Hope someone will complete the answer...see who got it?

---

This program is not much of a challenge. But nobody will do your homwork.
Ask specific questions and we will be glad to answer them.
Kurt

Quote:

---

Originally Posted by ZuK

This program is not much of a challenge. But nobody will do your homwork.
Ask specific questions and we will be glad to answer them.
Kurt

---

Help me pls...i have try to do some...just need some help...
see the code below...does any mistakes??
i dunno where should the do while loop put...

Code:

---

#include <iostream>
#include <fstream>
#include <iomanip>

using namespace std;

int main()
{
    double ISDN ;
    char title;
        float price;
        int continues;
        char ans;
       
        cout<<"---Welcome To Billy's Bookshop---\n";
        cout<<"Please enter the ISDN: ";
        cin>>ISDN;

        if (ISDN==12)
        {
                cout<<"The Title is C++ How to Program"<<endl<<"The Price is RM 108.90"<<endl;
        }
    if (ISDN==98)
        {
                cout<<"The Title is Introduction to Java Programming"<<endl<<"The Price is RM 89.60"<<endl;
        }
        else
        {               
                cout<<"Not Valid"<<endl;
        }

       
        do
        {
      cout<< "Do you want to continue (Y/N)?\n";
      cout<< "You must type a 'Y' or an 'N'.\n";
      cin >> ans;
        }
        while((ans !='Y')&&(ans !='N')&&(ans !='y')&&(ans !='n'));

       
        return 0;
}

---

Code:

---

int main()
{
    double ISDN ;
    char title;
        float price;
        int continues;
        char ans = 'Y';
       
        cout<<"---Welcome To Billy's Bookshop---\n";

while((ans !='N') || (ans !='n') && (ans =='y') || (ans =='Y'))
{
        cout<<"Please enter the ISDN: ";
        cin>>ISDN;

        if (ISDN==12)
        {
                cout<<"The Title is C++ How to Program"<<endl<<"The Price is RM 108.90"<<endl;
        }
    if (ISDN==98)
        {
                cout<<"The Title is Introduction to Java Programming"<<endl<<"The Price is RM 89.60"<<endl;
        }
        else
        {               
                cout<<"Not Valid"<<endl;
        }

      cout<< "Do you want to continue (Y/N)?\n";
      cout<< "You must type a 'Y' or an 'N'.\n";
      cin >> ans;
}

       
        return 0;
}

---

Isnt this your second topic about this? reread c++ tutorials and books, they tell you the basics of how to do a program like this.

At this point I'd suggest adding an counter that adds +1 after each book is bought, and you use an array to keep track of the books bought, ie. array[counterhere].

> double ISDN ;
1. There's a big difference between ISBN and ISDN
2. std::string ISBN;
would be a much better data type in my opinion.

Quote:

---

Originally Posted by Salem

> double ISDN ;
1. There's a big difference between ISBN and ISDN
2. std::string ISBN;
would be a much better data type in my opinion.

---

can show me how is the coding look like???

this part...as u say the ISDN

ISDN n ISBN wat is the different??

Question:=

Welcome to Billy’BookShop

Please enter the ISBN: 0128
The title is C++ How to Program
The Price is RM 108.90

Do you wish to continue? y/n
y

Please enter the ISBN: 0992
The title is Introduction to Java Programming
The Price is RM 89.60

Do you wish to continue? y/n
n

help me with the coding for this part....

Quote:

---

Originally Posted by Dae

Isnt this your second topic about this? reread c++ tutorials and books, they tell you the basics of how to do a program like this.

At this point I'd suggest adding an counter that adds +1 after each book is bought, and you use an array to keep track of the books bought, ie. array[counterhere].

---

Help me up with the 1st part pls...i hv try it not works... :confused: :confused:
not i dun wan to do it...but dunno...so i ask for ur help...

Question:

Welcome to Billy’BookShop

Please enter the ISBN: 0128
The title is C++ How to Program
The Price is RM 108.90

Do you wish to continue? y/n
y

Please enter the ISBN: 0992
The title is Introduction to Java Programming
The Price is RM 89.60

Do you wish to continue? y/n
n


pls help me with codings...

thanks a millions....

> can show me how is the coding look like???
Pretty much like you have now
some cin to read input
some if() to compare it.

Quote:

---

Originally Posted by jason07

w
ISDN n ISBN wat is the different??

---

learn to use google to find common answeres.

ISDN

Quote:

---

Originally Posted by jason07

Help me up with the 1st part pls...i hv try it not works... :confused: :confused:
not i dun wan to do it...but dunno...so i ask for ur help...

thanks a millions....

---

I assumed you could fix it yourself after seeing that much. Are you self-teaching yourself? or is this homework - what it looks like.

use this while statement instead:

Code:

---

while((ans != 'N' || ans != 'n') && (ans == 'y' || ans =='Y'))

---

What its doing there is the while statement will continue if the answer choice is not 'n' or 'N', and will continue if its 'y' or 'Y'.

and look at your if and else statements, it should be

Code:

---

else if (ISDN==98)

---

The reason is because it was printing out the else statement if you happened to enter 12. There rest would follow that trend also:

Code:

---

if (ISDN==12) {

}
else if (ISDN==98) {

}
else if (ISDN==34) {

}
else if (ISDN==43) {

}
else if (ISDN==74) {

}
else {
//this is only printed if none of the above are chosen
}

---

Read what I write, try to understand whats going on before messing around with it not knowing what you're doing, or go study more.