Need Help with 2D array (Library System)

Hey Guys, I need assistance with my code because everytime it skips the part to input. Maybe someone could help me with my code. here it is.

Code:

---

int main()
{
    int index,choice,choiceloop,row=0,col=0,main=0,stop;
    char bookstore[20][50],loopchoice,booktitle[50];
    do
    {
    system("cls");
    cout<<"Welcome to MMSU's Library System"<<endl;
    cout<<"Press 1 to Add Books"<<endl;
    cout<<"Press 2 to Display Books"<<endl;
    cout<<"Press 3 to Search Books"<<endl;
    cout<<"Press 4 to Edit Books"<<endl;
    cout<<"Press 0 to exit the System"<<endl;
    cout<<endl<<"Choice: ";
    cin>>choice;
    if(choice==1)
    {
        system("cls");
        cout<<"ADDING BOOK - MMSU Library System"<<endl;
        row=0;
        do
        {
            cout<<endl<<"Title: ";
            fgets(bookstore[row],50,stdin);
            //for(row=0;row<20;row++)
            //    for(col=0;col<50;col++)
            //        booktitle[col]=bookstore[row][col];
            cout<<endl<<"Do you want to enter again(Y/N): ";
            cin>>loopchoice;
            if(loopchoice=='y'||loopchoice=='Y')
            {
                choiceloop=1;
                row++;
            }   
            else if(loopchoice=='n'||loopchoice=='N')
            {
                choiceloop=0;
                main=1;
            }   
        }
        while(choiceloop==1);

---

I know its a long read but I'd be grateful if you could help. Thanks in Advance Guys

Don't mix C-style input with C++-style I/O. This:

Code:

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fgets(bookstore[row],50,stdin);

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should be:

Code:

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cin.getline(bookstore[row], 50);

---

Anyway, the problem is that this line:

Code:

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cin>>choice;

---

leaves the newline from entering the input in the input buffer. You could use cin.ignore() to remove that newline.

Thanks sir Laserlight, I have already made that work using cin.getline. Now i have a new problem.

Code:

---

else if(choice==3)
    {
        system("cls");
        cout<<"SEARCH BOOK - MMSU Library System"<<endl;
        do
        {
            cin.ignore();
            cout<<endl<<"Find Book Title: ";
            cin.getline(booktitle,50);
            for(row=0;row<20;row++)
            {
                for(col=0;col<50;col++)
                {
                    if(booktitle[col]==bookstore[row][col])
                        continue;
                       
                    else if(booktitle[col]!=bookstore[row][col])
                    {
                        stop=1;
                        cout<<"No Book Found";
                        break;
                    }
                }
                if(stop=1)
                    break;
            }   
            cout<<endl<<"Do you want to borrow book/s again(Y/N): "<<endl;
            cin>>loopchoice;
            if(loopchoice=='y'||loopchoice=='Y')
                choiceloop=1;
            else if(loopchoice=='n'||loopchoice=='N')
            {
                choiceloop=0;
                main=1;
            }
        }
        while(choiceloop==1);

---

In this code the program has to search for the book in the array.

For Example:
I chose 1 to add book Title: How I Met Your Mother/how i met your mother (How do I configure it to check for both lower case and upper case?)

then I chose 3 to search Book Title.
I enter title: How I Met Your Mother
but it returns No Book Found.

So, you are just asking how to check for both upper and lower case? One solution is to convert the strings to be lowercase only for searching.

I have already gone past the 2nd problem, Just used toupper now I have a third problem and hopefully the last one.

Code:

---

else if(choice==2)
    {
        system("cls");
        cout<<"DISPLAY BOOK - MMSU Library System"<<endl;
        cout<<"\tBook Index\t\tTitle"<<endl;
        for(row=0;row<20;row++)
            cout<<"\t"<<row<<"\t\t"<<bookstore[row]<<endl;
        main=1;
        system("pause");
    }

---

The problem is that the program only has to display the row with values in it. my program displays 0-19 with trash values. how do I do it?

Keep a count of how many rows are in use, then loop until that point instead of always looping to 20.

Done! That was the last problem. Thank you sir laserlight! you are a very helpful person. Thank you so much!

You're welcome. Good to know I've been knighted :D

Quote:

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Originally Posted by laserlight

You're welcome. Good to know I've been knighted :D

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Shouldn't your title be "Dame" though?

Please use std::string instead of char arrays. Then, use std::getline instead of std::cin.getline.