Programming Forums > Application Development > Java

DaWei · May 11th, 2006, 7:21 AM

I have no problem with your asking for clarification, that's often needed. Your following post, well.... If pointing out the need for clarity, as well as suggesting some places to peer into, was enough to 'scare him away', it doesn't bode well for his teachability. Just sayin', as the OP hasn't suggested that at all.

ReggaetonKing · May 11th, 2006, 8:13 AM

Not enough members read the forum faqs and rules. It's their own fault, if they don't receive a reply when asking for help but instead being corrected. One expects help and doesn't do their part , this irritates me as well as you.

NightShade01 · May 11th, 2006, 5:31 PM

Your're both right in the fact that not enough people read the posting rules not only in this forum but for any forum for that matter. And you didnt' scare me away I just realized after reading all your comments and replies that I clearly didn't know enough about arrays or for loops to pose a question in the correct fashion so i spent the rest of last night reading and trying to learn something about the two topics. And sry again for not being clear....i need to make a program that outputs:
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
6 A B C D
7 A B C D
then after outputing this it should prompt the user for a choice of where they want to sit.(the assortment of letters and numbers are suppose to represent an airplane seating chart).

DaWei · May 11th, 2006, 6:04 PM

Precisely how one would do it would depend on the language. This is the Java forum, and I really don't plan on going back to Java, but consider this approach:

Use a two-dimensional array for a seating plan, just as you've shown it. Initialize all the elements to blank. Output it, formatted, much as you have shown it. Move into your input loop. Accept as input a row/seat pair, and maybe a name. Map that row/seat pair to a row/column position in the array. Place something in that element; passenger name, big X, "occupado", whatever flips your skirt. Output it, formatted as before. My engineers actually produced something like this as part of a larger program back in about 1991.

'For' loops are simple. If you want an explanation, post back. It'll no doubt be virtually identical to what your learning materials say.

NightShade01 · May 11th, 2006, 6:14 PM

Thanks for the advice it helped alot! I read back over what i had orignally and fixed up my for loops and array. Now i have this:

(Toggle Plain Text)

 int[][] seat;
    seat = new int[7][5];
    
    int row, column;
    for(row = 0; row < 7; row++){
      
      for(column = 0; column < 5; column++){
        seat[0][0] = 1;
        seat[1][0] = 2;
        seat[2][0] = 3;
        seat[3][0] = 4;
        seat[4][0] = 5;
        seat[5][0] = 6;
        seat[6][0] = 7;
        System.out.print(seat[row][column]+ " ");
      }
        System.out.println();
    }

My question is more of, once this is compile it output's:
1 0 0 0 0
2 0 0 0 0
3 0 0 0 0
4 0 0 0 0
5 0 0 0 0
6 0 0 0 0
7 0 0 0 0
how would i replace the "0's" with letters if the array is of type int?

DaWei · May 11th, 2006, 6:22 PM

Don't make it of type int. One can put text representations of numbers in a text container, but not vice versa. After all, your screen isn't showing an int, it's showing a presentational encoding of an int.

lectricpharaoh · May 11th, 2006, 10:53 PM

Quote:

Originally Posted by NightShade01

My question is more of, once this is compile it output's:
1 0 0 0 0
2 0 0 0 0
3 0 0 0 0
4 0 0 0 0
5 0 0 0 0
6 0 0 0 0
7 0 0 0 0
how would i replace the "0's" with letters if the array is of type int?

How do you want to store the data? If you want a simple 'vacant/occupied' flag, then use boolean, and then you can perform a check on the seat's status, and output the appropriate text. If you want the passenger's ticket ID, use a numeric type (assuming the ticket ID is not alphanumeric). If you want an alphanumeric piece of text (name, ticket ID with letters, dashes, etc), then use String.

In any case, you should be able to check the status, with a predefined value indicating vacancy. For data types of boolean, int, and String, you could use false, 0, and "" (empty text), respectively.

titaniumdecoy · May 11th, 2006, 11:21 PM

In your original post, you were displaying the seating chart as the letters A-D. I would use an array of chars, and print the row number (int row) before each line.

May 11th, 2006, 7:21 AM	#11
DaWei Resident Grouch Join Date: Jun 2005 Posts: 6,453 Rep Power: 10	I have no problem with your asking for clarification, that's often needed. Your following post, well.... If pointing out the need for clarity, as well as suggesting some places to peer into, was enough to 'scare him away', it doesn't bode well for his teachability. Just sayin', as the OP hasn't suggested that at all. __________________ Abstraction doesn't make it impossible to write bad code; it makes it possible to write superior code. Contributor's Corner: Grumpy on C++ Exceptions DaWei on Pointers

May 11th, 2006, 8:13 AM	#12
ReggaetonKing Sexy Programmer Join Date: Nov 2005 Location: New Jersey Posts: 891 Rep Power: 4	Not enough members read the forum faqs and rules. It's their own fault, if they don't receive a reply when asking for help but instead being corrected. One expects help and doesn't do their part , this irritates me as well as you. __________________ I would love to change the world, but they won't give me the source code!

May 11th, 2006, 6:04 PM	#14
DaWei Resident Grouch Join Date: Jun 2005 Posts: 6,453 Rep Power: 10	Precisely how one would do it would depend on the language. This is the Java forum, and I really don't plan on going back to Java, but consider this approach: Use a two-dimensional array for a seating plan, just as you've shown it. Initialize all the elements to blank. Output it, formatted, much as you have shown it. Move into your input loop. Accept as input a row/seat pair, and maybe a name. Map that row/seat pair to a row/column position in the array. Place something in that element; passenger name, big X, "occupado", whatever flips your skirt. Output it, formatted as before. My engineers actually produced something like this as part of a larger program back in about 1991. 'For' loops are simple. If you want an explanation, post back. It'll no doubt be virtually identical to what your learning materials say. __________________ Abstraction doesn't make it impossible to write bad code; it makes it possible to write superior code. Contributor's Corner: Grumpy on C++ Exceptions DaWei on Pointers

May 11th, 2006, 6:14 PM	#15
NightShade01 Programmer Join Date: Oct 2005 Posts: 52 Rep Power: 4	Thanks for the advice it helped alot! I read back over what i had orignally and fixed up my for loops and array. Now i have this: (Toggle Plain Text) int[][] seat; seat = new int[7][5]; int row, column; for(row = 0; row < 7; row++){ for(column = 0; column < 5; column++){ seat[0][0] = 1; seat[1][0] = 2; seat[2][0] = 3; seat[3][0] = 4; seat[4][0] = 5; seat[5][0] = 6; seat[6][0] = 7; System.out.print(seat[row][column]+ " "); } System.out.println(); } int[][] seat; seat = new int[7][5]; int row, column; for(row = 0; row < 7; row++){ for(column = 0; column < 5; column++){ seat[0][0] = 1; seat[1][0] = 2; seat[2][0] = 3; seat[3][0] = 4; seat[4][0] = 5; seat[5][0] = 6; seat[6][0] = 7; System.out.print(seat[row][column]+ " "); } System.out.println(); } My question is more of, once this is compile it output's: 1 0 0 0 0 2 0 0 0 0 3 0 0 0 0 4 0 0 0 0 5 0 0 0 0 6 0 0 0 0 7 0 0 0 0 how would i replace the "0's" with letters if the array is of type int?

May 11th, 2006, 6:22 PM	#16
DaWei Resident Grouch Join Date: Jun 2005 Posts: 6,453 Rep Power: 10	Don't make it of type int. One can put text representations of numbers in a text container, but not vice versa. After all, your screen isn't showing an int, it's showing a presentational encoding of an int. __________________ Abstraction doesn't make it impossible to write bad code; it makes it possible to write superior code. Contributor's Corner: Grumpy on C++ Exceptions DaWei on Pointers

May 11th, 2006, 5:31 PM	#13
NightShade01 Programmer Join Date: Oct 2005 Posts: 52 Rep Power: 4	Your're both right in the fact that not enough people read the posting rules not only in this forum but for any forum for that matter. And you didnt' scare me away I just realized after reading all your comments and replies that I clearly didn't know enough about arrays or for loops to pose a question in the correct fashion so i spent the rest of last night reading and trying to learn something about the two topics. And sry again for not being clear....i need to make a program that outputs: 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 6 A B C D 7 A B C D then after outputing this it should prompt the user for a choice of where they want to sit.(the assortment of letters and numbers are suppose to represent an airplane seating chart).

May 11th, 2006, 11:21 PM	#18
titaniumdecoy Expert Programmer Join Date: Nov 2005 Posts: 903 Rep Power: 3	In your original post, you were displaying the seating chart as the letters A-D. I would use an array of chars, and print the row number (int row) before each line.

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Programming Forums > Application Development > Java

Multi array question