Methods for initialising 2D arrays

[almulsi]

hi
i just start studying programing and i actually i have problem with my code i would be happy if you help me out in this
i need to display the seat pattern in air plane like this
1 ABCD
2ABCD
3ABCD
4ABCD
5ABCD
6ABCD
6ABCD
7ABCD AND HER E IS MY TREYING

#include <iostream>
using namespace std;
#define NumRows 7
#define Numcols 4 
int  main()
{
    char Broad[7][4];
 
    int rows;
    int cols;
    int Y;
 
    cout << "wellcome to our online resrvation seats" << "please press Y to display the avalible seats" << endl;
    cin >> Y;
    for (int rows=0;rows<=7; rows++) 
    {
        for (int cols=0; cols<=4; cols++)
 
        {
 
 
 
            // initialize the first row.
            Broad[0][1]= 'A';
            Broad[0][2]='B';
            Broad[0][3]='c';
            Broad[0][4]='D';
 
            // initialize the second row.
            Broad[1][1]= 'A';
            Broad[1][2]='B';
            Broad[1][3]='c';
            Broad[1][4]='D';
            // initilize the third row.
            Broad[2][1]= 'A';
            Broad[2][2]='B';
            Broad[2][3]='c';
            Broad[2][4]='D';
            // intilize the fourth row.
            Broad[3][1]= 'A';
            Broad[3][2]='B';
            Broad[3][3]='c';
            Broad[3][4]='D';
            // intialize the fivth row.
            Broad[4][1]= 'A';
            Broad[4][2]='B';
            Broad[4][3]='c';
            Broad[4][4]='D';
            // intialize the sixth row.
            Broad[5][1]= 'A';
            Broad[5][2]='B';
            Broad[5][3]='c';
            Broad[5][4]='D';
            //  intialize the sventh row.
            Broad[6][1]= 'A';
            Broad[6][2]='B';
            Broad[6][3]='c';
            Broad[6][4]='D';
            cout <<"(" << cols << rows << ")\t";
        }
    }
}
 

[JosAH]

Just a few observations:

1) you re-initialize the entire array everytime you're in the loop body;
2) column indexes also start at zero;
3) array initialization can be done like this:

char seats[7][4]= { { 'a', 'B', 'c', 'd' }, { 'A', 'B', 'c', 'D' }, 
                  /* etc */ }};

kind regards,

Jos

[Savage]

Or you can use two for loops,like:

for(i=0;i<7;i++)
{
      for(j=0;j<4;j++) c=65+j,broad[i][j]=c;/*65 is ASCII for char A so if you add it the counter value it should increse up to 68 which is 'D'.*/
}

Savage

[almulsi]

Dear friend i want say thank you for you r fast reply .
i already did you have told me but the i want you tell me how do i call the array to be shown as i mentioned above coz
what i did befor i used an example for chess board
so i may expect more explain
thank you

[Banfa]

Hi almulsi,

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Banfa
Administrator

[almulsi]

o k , thank you for your guide line , and i am so sorry if i did not make my self clear to you . the question is can somebody help me with my case study??? coz iam really having a
> hard time doing this.. i am a beginner../
> i need to write a program that assign a passenger seats in an
> airplane, assuming that a small airplane with seats numbered as
> follows:
>
> 1 A B C D
> 2 A B C D
> 3 A B C D
> 4 A B C D
> 5 A B C D
> 5 A B C D
> 6 A B C D
> 7 A B C D
>
> the program shld. display the seat pattern, marking with an "X" the
> seats already assigned. For example, after seats 1A, 2B, 4C are
> taken, the display shld. look like
>
> 1 X B C D
> 2 A X C D
> 3 A B C D
> 4 A B X D
> 5 A B C D
> 6 A B C D
> 7 A B C D

After displaying the seats available, the program prompts for the
seat desired, the user types in a seat, and then display of available
seats is updated. This continues until all seats are filled or until
the user signals that the program shld. end. If the user types in a
seat that is already assigned, the program shld. say that the seat is
occupied and ask for another choice. the program shld. take into
consideration the use of arrays and functions as well as the user
interface.

tnx in advance.. have a nice day!!

[Savage]

o k , thank you for your guide line , and i am so sorry if i did not make my self clear to you . the question is can somebody help me with my case study??? coz iam really having a
> hard time doing this.. i am a beginner../
> i need to write a program that assign a passenger seats in an
> airplane, assuming that a small airplane with seats numbered as
> follows:
>
> 1 A B C D
> 2 A B C D
> 3 A B C D
> 4 A B C D
> 5 A B C D
> 5 A B C D
> 6 A B C D
> 7 A B C D
>
> the program shld. display the seat pattern, marking with an "X" the
> seats already assigned. For example, after seats 1A, 2B, 4C are
> taken, the display shld. look like
>
> 1 X B C D
> 2 A X C D
> 3 A B C D
> 4 A B X D
> 5 A B C D
> 6 A B C D
> 7 A B C D

After displaying the seats available, the program prompts for the
seat desired, the user types in a seat, and then display of available
seats is updated. This continues until all seats are filled or until
the user signals that the program shld. end. If the user types in a
seat that is already assigned, the program shld. say that the seat is
occupied and ask for another choice. the program shld. take into
consideration the use of arrays and functions as well as the user
interface.

tnx in advance.. have a nice day!!

Well,if we suppose that all seats won't be reservated at once(as they probably wouldn't) I get conclusion that you will need to write it to a file which will be opened and loaded once the programme is started

Secound,to make a user input it would take that him fill up both dimensions.There are two ways:

First way,is simpler for user but it might be complicated for you:

you could make a string of two caracters entered by once (like 1A)
and then break it so that first part is converted to int and fills up first dimenison,and secound is char and fills secound dimension.All this will be iniside do-while loop which will execute until there are free seats or until
user press ESC.

Secound way,is simpler to make but there is qestion of functionality and
user will be prompted twice instead of once(like I explained above).it's
to make first input for row,and secound input for seat char.

And third part was:How to update this array?

You will need to search your array until it matches with user input and then remember those coordinates and update it with x.


After all of this you must owerwrite/update your file and exit programme.



I hope this helps a bit.

When you have acomplished or/and have some troubles please post just that part(use also codetags #) and we will help you to fix it or to make it even more better!!!


Savage

[almulsi]

Well,if we suppose that all seats won't be reservated at once(as they probably wouldn't) I get conclusion that you will need to write it to a file which will be opened and loaded once the programme is started

Secound,to make a user input it would take that him fill up both dimensions.There are two ways:

First way,is simpler for user but it might be complicated for you:

you could make a string of two caracters entered by once (like 1A)
and then break it so that first part is converted to int and fills up first dimenison,and secound is char and fills secound dimension.All this will be iniside do-while loop which will execute until there are free seats or until
user press ESC.

Secound way,is simpler to make but there is qestion of functionality and
user will be prompted twice instead of once(like I explained above).it's
to make first input for row,and secound input for seat char.

And third part was:How to update this array?

You will need to search your array until it matches with user input and then remember those coordinates and update it with x.


After all of this you must owerwrite/update your file and exit programme.



I hope this helps a bit.

When you have acomplished or/and have some troubles please post just that part(use also codetags #) and we will help you to fix it or to make it even more better!!!


Savage

well thank you for your reply but what i want to say is that my course still not coverd the ClASS ND HOW MAKE THW FILE so , i expect you give me way that i can apply straight forward , thank you and have nice day

[Savage]

Do you know how to use structures?

[almulsi]

Do you know how to use structures?

well to be honest we have not covered this topic till now so why iam strugling doing this .please help me

[Savage]

So here are the consequences:

1. There is no way u can save data whitout using files which means that every time u start programm it will be "reseted". ( it will start with all seats empty )

2. It might(will) be harder to make it without using structures.

Still it can be done.Probably(Hopefully) your programm is meant ro be reseted upon each start.

This is left to be done:

1.You need to make up 2D array(try using my for loops or Jos's way to do it).

2.Realise user input(One of two wich i presented as ur choice in my secound post).

3.How to update it? Also look in my secound post.




Savage