Thread: HELP Homework Validating ISBN with dashes due next week

I need to write a program that validates ISBN numbers in the that are 10 digits long with the 10 th digit being the check sum digit example
ISBN: 0-13-240416-8
0+2*1+3*3+4*2+5*4+6*0+7*4+8*1+9*6=129
When 129 is divide by 11 the remainder is 8
check digit is 8.

I have to write a program that will determine the string of characters entered only contain dash("-") and numeric characters ( in a 10 digit ISBN the dashes may be in different locations depending on the book publisher.). If characters are valid it must the calc. the check digit to determine if the ISBN is valid.

I need to include user-written functions to.
* validate input
*calculate the check digit validity
stlib. funct. for checking numeric values may also be useful.

I have a basic idea of how to write a program in C++

Code:

#include <iostream>
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#include <process.h>
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#include <iomanip>
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#include <conio.h>
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#include <string>
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#include <stdio.h>
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#include <ctype.h>
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#include <windows.h>
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using namespace std;
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void gotoxy(int x, int y)
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{
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  COORD coord;
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  coord.X = x;
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  coord.Y = y;
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  SetConsoleCursorPosition(GetStdHandle(STD_OUTPUT_HANDLE), coord);
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}
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void clrscr(int x, int y)
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{
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    COORD                      coordScreen = { x, y };
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    DWORD                      cCharsWritten;
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    CONSOLE_SCREEN_BUFFER_INFO  csbi;
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    DWORD                      dwConSize;
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    HANDLE                    hConsole = GetStdHandle(STD_OUTPUT_HANDLE);
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    GetConsoleScreenBufferInfo(hConsole, &csbi);
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    dwConSize = csbi.dwSize.X * csbi.dwSize.Y;
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    FillConsoleOutputCharacter(hConsole, TEXT(' '),
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                               dwConSize, coordScreen, &cCharsWritten);
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    GetConsoleScreenBufferInfo(hConsole, &csbi);
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    FillConsoleOutputAttribute(hConsole, csbi.wAttributes,
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                               dwConSize, coordScreen, &cCharsWritten);
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    SetConsoleCursorPosition(hConsole, coordScreen);
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}
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void main (void)
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{
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    int isbn[5] = {11110, 12221, 13332, 24443, 25554};
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    string book_title[5] = {"Binary Kibbles and Bits", "Syntaxico", "Vitamin C++", "Surf and Turf the Web",
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        "Java-lin: Olympic Favorite"};
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    float retail[5] = {155.95, 116.75, 126.50, 125.75, 138.99};
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    int i = 0;
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    int x = 6;
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    int qty = 0;
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    int y = 0;
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    float total = 0.00;
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    string option = "t";
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    gotoxy(10,4);
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    cout << "ISBN" << endl;
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    gotoxy(20,4);
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    cout << "Title" << endl;
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    gotoxy(47,4);
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    cout << "Price" << endl;
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    gotoxy(54,4);
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    cout << "Qty" << endl;
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    gotoxy(58,4);
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    cout << "Total" << endl;
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    do
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    {
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    gotoxy(10,x);
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    cin >> i;
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    for(y = 0; y < 5; y++)
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    {
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        if(i == isbn[y])
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            break;
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        else if(i !=
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        {
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            gotoxy(10,x);
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            cin >> i;
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        }
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    }
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    for(y = 0; y < 5; y++)
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    {
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        if(i == isbn[y])
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            break;
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    }
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    gotoxy(20,x);
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    cout << book_title[y] << endl;
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    gotoxy(47,x);
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    cout << retail[y] << endl;
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    gotoxy(54,x);
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    cin >> qty;
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    total = retail[y]* qty;
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    gotoxy(58,x);
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    cout << total << endl;
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    x++;
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    gotoxy(10,11);
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    cout << "Press t for total, or type in another ISBN number." << endl;
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    gotoxy(10,x);
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    cin >> option;
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    gotoxy(10,11);
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    clrscr(10,11);
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    if(option == "t");
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    break;
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    }while(option == "t" || x < 11);
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    _getch();
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}